For each of the descriptions of reactions, i – iv, directly below, match one of

Question

For each of the descriptions of reactions, i – iv, directly below, match one of the statements, A – D. Put the appropriate letter A, B, C or D in the blank provided in front of each reaction description, i – iv.

i) ____ An endothermic reaction in which the products have less entropy than the reactants

ii) ____ An endothermic reaction in which the products have more entropy than the reactants

iii) ____ An exothermic reaction in which the products have less entropy than the reactants

iv) ____ An exothermic reaction in which the products have more entropy than the reactants

A. This describes a reaction that will be nonspontaneous at all temperatures.

B. This describes a reaction that will be spontaneous at all temperatures.

C. This describes a reaction that might be spontaneous or nonspontaneous depending on the temperature. A higher temperature favors a spontaneous reaction.

D. This describes a reaction that might be spontaneous or nonspontaneous depending on the temperature. A lower temperature favors a spontaneous reaction.

Explanation / Answer

Exothermic reaction:

In the exothermic reaction the reactants exudes energy to surrounding to form product. For exothermic reaction is the difference between the energy of reactant and the energy of product.

Endothermic reaction:

In the endothermic reaction the reactants absorbs energy from surrounding to form product. For endothermic reaction is the difference between the energy of product and the energy of reactant.

i) __A__ An endothermic reaction in which the products have less entropy than the reactants

ii) ___C_ An endothermic reaction in which the products have more entropy than the reactants

iii) _D___ An exothermic reaction in which the products have less entropy than the reactants

iv) ___B_ An exothermic reaction in which the products have more entropy than the reactants

A. This describes a reaction that will be nonspontaneous at all temperatures.

B. This describes a reaction that will be spontaneous at all temperatures.

C. This describes a reaction that might be spontaneous or nonspontaneous depending on the temperature. A higher temperature favors a spontaneous reaction.

D. This describes a reaction that might be spontaneous or nonspontaneous depending on the temperature. A lower temperature favors a spontaneous reaction.

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