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What is indicated by a negative value of ΔH in a chemical reaction?
What is indicated by a negative value of ΔH in a chemical reaction?
What happens to the enthalpy change when a reaction occurs exothermically?
What happens to the enthalpy change when a reaction occurs exothermically?
Under standard conditions, enthalpy changes are measured at which temperature?
Under standard conditions, enthalpy changes are measured at which temperature?
How is the relationship between the activation energies of the forward and reverse reactions expressed in terms of ΔH?
How is the relationship between the activation energies of the forward and reverse reactions expressed in terms of ΔH?
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In an energy diagram of an exothermic reaction, which part represents the energy level of the products?
In an energy diagram of an exothermic reaction, which part represents the energy level of the products?
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What characterizes an endothermic reaction?
What characterizes an endothermic reaction?
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In the reaction $CH_4(g) + 2O_2(g) \rightarrow CO_2(g) + 2H_2O(g)$, what does the negative enthalpy change ($
abla H = -890 , kJmol^{-1}$) indicate?
In the reaction $CH_4(g) + 2O_2(g) \rightarrow CO_2(g) + 2H_2O(g)$, what does the negative enthalpy change ($ abla H = -890 , kJmol^{-1}$) indicate?
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What is represented by $E_a$ on the energy graph of a reaction?
What is represented by $E_a$ on the energy graph of a reaction?
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Which of the following statements is true regarding the energy changes during an endothermic reaction?
Which of the following statements is true regarding the energy changes during an endothermic reaction?
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What defines the energy content of the reactants and products in a chemical reaction?
What defines the energy content of the reactants and products in a chemical reaction?
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