The reaction 2cu(s) + co2(g) → 2cuo(s) + c(s) is endothermic. which of the following statements is true?
a) the reaction is not spontaneous at any temperature.
b) the reaction is spontaneous at all temperatures.
c) it is impossible to determine if the reaction is spontaneous without calculations.
d) the reaction will be spontaneous only at low temperatures.
e) the reaction will be spontaneous only at high temperatures.

The correct answer is option E.

Explanation:

ΔG° = ΔH° - TΔS° (Gibbs's equation)

where :

ΔG° = Gibbs free energy of reaction at temperature T.

ΔH° = Enthalpy  of reaction at temperature T.

ΔS° = Entropy change of the reaction

for, endothermic ,ΔH° = positive

And for reaction to spontaneous ΔG° shluld negative,ΔG° = negative

ΔG°(negative)=ΔH°(positive) - T(High)ΔS°

So, for the reaction which are endothermic are spontaneous at high temperatures.

The given reaction is endothermic reaction.So, this reaction will be spontaneity at higher temperature

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