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Questions and Answers
What is the main difference between the potential energy diagrams of uncatalysed and catalysed endothermic reactions?
What is the main difference between the potential energy diagrams of uncatalysed and catalysed endothermic reactions?
- The uncatalysed reaction has a higher activation energy peak. (correct)
- The uncatalysed reaction has a lower activation energy peak.
- The catalysed reaction has a higher activation energy peak.
- There is no difference in the activation energy peaks.
Which of the following statements about exothermic reactions is correct?
Which of the following statements about exothermic reactions is correct?
- The energy level of the products is always higher than the energy level of the reactants in exothermic reactions.
- Exothermic reactions release energy, so the energy level of the products is lower than the energy level of the reactants. (correct)
- Catalysts do not affect the activation energy of exothermic reactions.
- Exothermic reactions always have a higher activation energy peak than endothermic reactions.
What information can be determined from the difference in height between the reactants and products on the potential energy diagram?
What information can be determined from the difference in height between the reactants and products on the potential energy diagram?
- The rate of the reaction.
- The activation energy of the reaction.
- The change in enthalpy (ΔH) of the reaction. (correct)
- The presence of a catalyst.
What is the purpose of the peak point on the potential energy diagram?
What is the purpose of the peak point on the potential energy diagram?
How does the presence of a catalyst affect the potential energy diagram of a reaction?
How does the presence of a catalyst affect the potential energy diagram of a reaction?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
Which of the following statements about the potential energy diagrams of uncatalysed and catalysed reactions is correct?
Which of the following statements about the potential energy diagrams of uncatalysed and catalysed reactions is correct?
What does the X-axis of the potential energy diagram represent?
What does the X-axis of the potential energy diagram represent?
Which of the following statements about the potential energy diagram of an endothermic reaction is incorrect?
Which of the following statements about the potential energy diagram of an endothermic reaction is incorrect?
How does the presence of a catalyst affect the potential energy diagram of an exothermic reaction?
How does the presence of a catalyst affect the potential energy diagram of an exothermic reaction?
What type of reaction absorbs energy, with products having higher energy than reactants?
What type of reaction absorbs energy, with products having higher energy than reactants?
Which term defines the minimum energy required for reactants to form products during a chemical reaction?
Which term defines the minimum energy required for reactants to form products during a chemical reaction?
What represents the unstable arrangement of atoms at the peak of the activation energy barrier?
What represents the unstable arrangement of atoms at the peak of the activation energy barrier?
In which reaction is energy released, with reactants having higher energy levels than the products?
In which reaction is energy released, with reactants having higher energy levels than the products?
What is the role of catalysts in chemical reactions?
What is the role of catalysts in chemical reactions?
Which represents a specific momentary mixture of reactants and products during a reaction?
Which represents a specific momentary mixture of reactants and products during a reaction?
What is the significance of activation energy in determining the rate of a reaction?
What is the significance of activation energy in determining the rate of a reaction?
Which term describes the energy barrier that must be overcome for a chemical reaction to proceed?
Which term describes the energy barrier that must be overcome for a chemical reaction to proceed?
In which type of reaction are reactants requiring external energy to convert into products?
In which type of reaction are reactants requiring external energy to convert into products?
What does the activated complex represent during a chemical reaction?
What does the activated complex represent during a chemical reaction?
What is the primary function of activation energy in a chemical reaction?
What is the primary function of activation energy in a chemical reaction?
How does a higher activation energy affect the reaction rate under the same conditions?
How does a higher activation energy affect the reaction rate under the same conditions?
What does the activated complex represent in a chemical reaction?
What does the activated complex represent in a chemical reaction?
Which of the following statements about the activated complex is true?
Which of the following statements about the activated complex is true?
What is the primary function of a positive catalyst in a chemical reaction?
What is the primary function of a positive catalyst in a chemical reaction?
How do positive catalysts increase the rate of a chemical reaction?
How do positive catalysts increase the rate of a chemical reaction?
What is the primary function of a negative catalyst (inhibitor) in a chemical reaction?
What is the primary function of a negative catalyst (inhibitor) in a chemical reaction?
Which of the following diagrams is used to represent activation energy in a chemical reaction?
Which of the following diagrams is used to represent activation energy in a chemical reaction?
What is the relationship between activation energy and the energy of the activated complex?
What is the relationship between activation energy and the energy of the activated complex?
Which of the following statements about catalysts is false?
Which of the following statements about catalysts is false?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
What is the primary function of activation energy in a chemical reaction?
What is the primary function of activation energy in a chemical reaction?
How does the presence of a catalyst affect the potential energy diagram of an exothermic reaction?
How does the presence of a catalyst affect the potential energy diagram of an exothermic reaction?
What term defines the minimum energy required for reactants to form products during a chemical reaction?
What term defines the minimum energy required for reactants to form products during a chemical reaction?
Which of the following statements about the potential energy diagram of an endothermic reaction is incorrect?
Which of the following statements about the potential energy diagram of an endothermic reaction is incorrect?
What represents the unstable arrangement of atoms at the peak of the activation energy barrier?
What represents the unstable arrangement of atoms at the peak of the activation energy barrier?
How does a higher activation energy affect the reaction rate under the same conditions?
How does a higher activation energy affect the reaction rate under the same conditions?
What is the primary function of a negative catalyst (inhibitor) in a chemical reaction?
What is the primary function of a negative catalyst (inhibitor) in a chemical reaction?
Which type of reaction absorbs energy, with products having higher energy than reactants?
Which type of reaction absorbs energy, with products having higher energy than reactants?
What is the main difference between the potential energy diagrams of uncatalyzed and catalyzed endothermic reactions?
What is the main difference between the potential energy diagrams of uncatalyzed and catalyzed endothermic reactions?
What role do positive catalysts (catalysts) play in a chemical reaction?
What role do positive catalysts (catalysts) play in a chemical reaction?
Which term best describes the activated complex in a chemical reaction?
Which term best describes the activated complex in a chemical reaction?
How does a higher activation energy affect the rate of a reaction under the same conditions?
How does a higher activation energy affect the rate of a reaction under the same conditions?
What is the primary function of negative catalysts (inhibitors) in a chemical reaction?
What is the primary function of negative catalysts (inhibitors) in a chemical reaction?
What information can be inferred from the difference in height between reactants and products on a potential energy diagram?
What information can be inferred from the difference in height between reactants and products on a potential energy diagram?
What characteristic differentiates activated complexes from reactants and products in a chemical reaction?
What characteristic differentiates activated complexes from reactants and products in a chemical reaction?
In a chemical reaction, what is the primary effect of a negative catalyst (inhibitor) on the rate of reaction?
In a chemical reaction, what is the primary effect of a negative catalyst (inhibitor) on the rate of reaction?
What do potential energy diagrams show in terms of chemical reactions?
What do potential energy diagrams show in terms of chemical reactions?
'Isolating the activated complex is challenging due to its:' ...?
'Isolating the activated complex is challenging due to its:' ...?
What is represented by the area under the curve from reactants to the peak point on a potential energy diagram?
What is represented by the area under the curve from reactants to the peak point on a potential energy diagram?
In a potential energy diagram, what does the difference in height between the reactants and products represent?
In a potential energy diagram, what does the difference in height between the reactants and products represent?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
How does the presence of a catalyst affect the potential energy diagram of a reaction?
How does the presence of a catalyst affect the potential energy diagram of a reaction?
What does the peak point on the potential energy diagram represent?
What does the peak point on the potential energy diagram represent?
What is the primary function of activation energy in a chemical reaction?
What is the primary function of activation energy in a chemical reaction?
How do positive catalysts increase the rate of a chemical reaction?
How do positive catalysts increase the rate of a chemical reaction?
What represents the unstable arrangement of atoms at the peak of the activation energy barrier?
What represents the unstable arrangement of atoms at the peak of the activation energy barrier?
Which term defines the minimum energy required for reactants to form products during a chemical reaction?
Which term defines the minimum energy required for reactants to form products during a chemical reaction?
What is the role of catalysts in chemical reactions?
What is the role of catalysts in chemical reactions?
Which of the following statements about the potential energy diagrams of uncatalysed and catalysed reactions is correct?
Which of the following statements about the potential energy diagrams of uncatalysed and catalysed reactions is correct?
What information can be determined from the difference in height between the reactants and products on the potential energy diagram?
What information can be determined from the difference in height between the reactants and products on the potential energy diagram?
Which of the following statements about the potential energy diagrams of uncatalysed and catalysed reactions is correct?
Which of the following statements about the potential energy diagrams of uncatalysed and catalysed reactions is correct?
What does the peak point on the potential energy diagram represent?
What does the peak point on the potential energy diagram represent?
What is the primary function of a positive catalyst in a chemical reaction?
What is the primary function of a positive catalyst in a chemical reaction?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
What does the area under the curve from reactants to the peak point on the potential energy diagram represent?
Which of the following statements about catalysts is false?
Which of the following statements about catalysts is false?
What is the main difference between the potential energy diagrams of uncatalysed and catalysed endothermic reactions?
What is the main difference between the potential energy diagrams of uncatalysed and catalysed endothermic reactions?
What is the primary function of activation energy in a chemical reaction?
What is the primary function of activation energy in a chemical reaction?
Which term best describes the activated complex in a chemical reaction?
Which term best describes the activated complex in a chemical reaction?
What does the X-axis of the potential energy diagram represent?
What does the X-axis of the potential energy diagram represent?
What effect does a higher activation energy have on the rate of a reaction under the same conditions?
What effect does a higher activation energy have on the rate of a reaction under the same conditions?
Which of the following characteristics best differentiates activated complexes from reactants and products?
Which of the following characteristics best differentiates activated complexes from reactants and products?
What is the primary function of a positive catalyst in a chemical reaction?
What is the primary function of a positive catalyst in a chemical reaction?
Which term best describes the activated complex in a chemical reaction?
Which term best describes the activated complex in a chemical reaction?
How do negative catalysts (inhibitors) affect a chemical reaction?
How do negative catalysts (inhibitors) affect a chemical reaction?
What defines a positive catalyst (catalyst) in a chemical reaction?
What defines a positive catalyst (catalyst) in a chemical reaction?
In terms of chemical reactions, what does a negative catalyst (inhibitor) primarily do?
In terms of chemical reactions, what does a negative catalyst (inhibitor) primarily do?
What is represented by a higher activation energy in a chemical reaction?
What is represented by a higher activation energy in a chemical reaction?
What happens to the rate of a reaction when a negative catalyst is introduced?
What happens to the rate of a reaction when a negative catalyst is introduced?
What role does a positive catalyst play in relation to activation energy?
What role does a positive catalyst play in relation to activation energy?
What is the primary characteristic that distinguishes the activated complex from the reactants and products during a chemical reaction?
What is the primary characteristic that distinguishes the activated complex from the reactants and products during a chemical reaction?
In the context of potential energy diagrams, what does the area under the curve from reactants to the peak point represent?
In the context of potential energy diagrams, what does the area under the curve from reactants to the peak point represent?
How do positive catalysts increase the rate of a chemical reaction?
How do positive catalysts increase the rate of a chemical reaction?
Which statement about the role of negative catalysts (inhibitors) in a chemical reaction is correct?
Which statement about the role of negative catalysts (inhibitors) in a chemical reaction is correct?
Which statement best describes the potential energy diagrams of uncatalyzed and catalyzed reactions?
Which statement best describes the potential energy diagrams of uncatalyzed and catalyzed reactions?
According to the law of conservation of energy in chemical reactions, what is the relationship between energy changes and enthalpy changes?
According to the law of conservation of energy in chemical reactions, what is the relationship between energy changes and enthalpy changes?
Which statement accurately describes the characteristic of the activated complex during a chemical reaction?
Which statement accurately describes the characteristic of the activated complex during a chemical reaction?
In the context of potential energy diagrams, what does the difference in height between the reactants and products represent?
In the context of potential energy diagrams, what does the difference in height between the reactants and products represent?
Which statement accurately describes the significance of activation energy in determining the rate of a chemical reaction?
Which statement accurately describes the significance of activation energy in determining the rate of a chemical reaction?
Which statement accurately describes the role of positive catalysts in chemical reactions?
Which statement accurately describes the role of positive catalysts in chemical reactions?
What feature on a potential energy diagram represents the highest point on the curve, symbolizing the activated complex?
What feature on a potential energy diagram represents the highest point on the curve, symbolizing the activated complex?
In a catalysed exothermic reaction, what is the primary effect on the activation energy peak?
In a catalysed exothermic reaction, what is the primary effect on the activation energy peak?
What does the X-axis represent on a potential energy diagram?
What does the X-axis represent on a potential energy diagram?
How are activated complexes different from reactants and products in a chemical reaction?
How are activated complexes different from reactants and products in a chemical reaction?
What aspect of a potential energy diagram highlights the difference made by the presence of a catalyst in a reaction?
What aspect of a potential energy diagram highlights the difference made by the presence of a catalyst in a reaction?
In an exothermic reaction, what does it signify if the curve ends below the initial energy level of the reactants?
In an exothermic reaction, what does it signify if the curve ends below the initial energy level of the reactants?
What does the difference in height between reactants and products represent on a potential energy diagram?
What does the difference in height between reactants and products represent on a potential energy diagram?
Which term best describes the activated complex in terms of its stability during a chemical reaction?
Which term best describes the activated complex in terms of its stability during a chemical reaction?
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