Consider the following reaction CaCO3sCaOsCO2g Estimate Delt

Consider the following reaction: CaCO_3(s)--->CaO(s)+CO_2(g)

Estimate Delta G or this reaction at each of the following temperatures. (Assume that Delta H and Delta S do not change too much within the given temperature range.)

320K?

1020K?

1470K?

and predict wether they will be spontaneous at each of the temperatures?

Solution

Delta H and Delta S values are not given..USE FORMULA del G =del H - T delS where del H and del S can be taken constant and temp is given to calculate del G. One thing os certain though as in product a gas is forming from a solid reactant..So del S is positive..So with increasing temperature T delS becomes more negative so as del G and rkn becomes more spontaneous