Which statement describes characteristics of an exothermic reaction? The sign of

Question

Which statement describes characteristics of an exothermic reaction? The sign of H is positive, and the products have less potential energy than the reactants. The sign of H is positive, and the products have more potential energy than the reactants. The sign of H is negative, and the products have less potential energy than the reactants. The sign of H is negative, and the products have more potential energy than the reactants. Consider the following endothermic reaction: H_2(g) + I_2(g) harr 2 HI(g). What will be the result of a decrease in temperature? The equilibrium will shift to the left and [H_2] will decrease The equilibrium will shift to the right and [HI] will decrease The equilibrium will shift to the right and [HI] will increase The equilibrium will shift to the left and [H_2] will increase

Explanation / Answer

14. The answer is C.

The sign of H is negative and the products have less potential energy than the reactants. The difference in the potential energies of the products and reactants is liberated as heat.

15 . H2 + I2 -------> 2HI

This reaction is endothermic in nature.

So according to Le Chatelier's Principle decrease in temperature for an endothermic reaction favours the formation of the reactants and hence more of H2 and I2 are formed. Hence the answer is D.

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