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Questions and Answers
In a scenario where a system's entropy is decreasing, what does this indicate about the system's state?
In a scenario where a system's entropy is decreasing, what does this indicate about the system's state?
- The system is approaching equilibrium.
- The system is becoming more ordered. (correct)
- The system's energy is increasing.
- The system is becoming more disordered.
Which of the following best describes the concept of an adiabatic process?
Which of the following best describes the concept of an adiabatic process?
- A process where the volume of the system remains constant.
- A process where no heat is transferred into or out of the system. (correct)
- A process where heat is transferred into or out of the system.
- A process where the temperature of the system remains constant.
What is the significance of Gibbs free energy in determining the spontaneity of a reaction at constant temperature and pressure?
What is the significance of Gibbs free energy in determining the spontaneity of a reaction at constant temperature and pressure?
- Gibbs free energy is only relevant at high temperatures.
- Gibbs free energy is not affected by changes in pressure.
- A positive change in Gibbs free energy indicates a spontaneous reaction.
- A negative change in Gibbs free energy indicates a spontaneous reaction. (correct)
How does an increase in temperature typically affect the rate of an endothermic reaction?
How does an increase in temperature typically affect the rate of an endothermic reaction?
What role do catalysts play in a chemical reaction?
What role do catalysts play in a chemical reaction?
How does Le Chatelier's principle predict the shift in equilibrium for an exothermic reaction when the temperature is increased?
How does Le Chatelier's principle predict the shift in equilibrium for an exothermic reaction when the temperature is increased?
For a reaction at equilibrium, if $\Delta G = 0$, what does this imply about the forward and reverse reaction rates?
For a reaction at equilibrium, if $\Delta G = 0$, what does this imply about the forward and reverse reaction rates?
What is the effect of increasing the concentration of a reactant on the rate of a chemical reaction, assuming all other factors remain constant?
What is the effect of increasing the concentration of a reactant on the rate of a chemical reaction, assuming all other factors remain constant?
In the context of chemical kinetics, what does the 'rate-determining step' refer to?
In the context of chemical kinetics, what does the 'rate-determining step' refer to?
What is the relationship between the equilibrium constant K, Gibbs free energy change $\Delta G$, and the standard free energy change $\Delta G^\circ$?
What is the relationship between the equilibrium constant K, Gibbs free energy change $\Delta G$, and the standard free energy change $\Delta G^\circ$?
Consider a reversible reaction $A \rightleftharpoons B$ with an equilibrium constant K > 1. Which of the following statements is true at equilibrium?
Consider a reversible reaction $A \rightleftharpoons B$ with an equilibrium constant K > 1. Which of the following statements is true at equilibrium?
How does the addition of an inert gas at constant volume affect an equilibrium reaction where the number of moles of gaseous reactants is not equal to the number of moles of gaseous products?
How does the addition of an inert gas at constant volume affect an equilibrium reaction where the number of moles of gaseous reactants is not equal to the number of moles of gaseous products?
What is the physical significance of activation energy in a chemical reaction?
What is the physical significance of activation energy in a chemical reaction?
Which of the following changes will always lead to an increase in the entropy of the system?
Which of the following changes will always lead to an increase in the entropy of the system?
How does increasing the pressure affect the equilibrium of a gaseous reaction where the number of moles of gaseous reactants is greater than the number of moles of gaseous products?
How does increasing the pressure affect the equilibrium of a gaseous reaction where the number of moles of gaseous reactants is greater than the number of moles of gaseous products?
For an endothermic reaction, how does the equilibrium constant, K, change with increasing temperature?
For an endothermic reaction, how does the equilibrium constant, K, change with increasing temperature?
Which statement accurately describes the relationship between enthalpy and entropy changes in a spontaneous process?
Which statement accurately describes the relationship between enthalpy and entropy changes in a spontaneous process?
How does the particle size of a solid reactant affect the rate of a heterogeneous reaction?
How does the particle size of a solid reactant affect the rate of a heterogeneous reaction?
Which of the following statements is true regarding the effect of a catalyst on a reversible reaction at equilibrium?
Which of the following statements is true regarding the effect of a catalyst on a reversible reaction at equilibrium?
What must be true of the standard reduction potential for a spontaneous redox reaction?
What must be true of the standard reduction potential for a spontaneous redox reaction?
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