### estimating an entropy change

Posted:

**Mon Jan 29, 2018 6:04 pm**Self-Test 9.13B: "Without doing any calculations, estimate the sign of the entropy change of the system for the reaction CaCO3(s) --> CaO(s) + CO2(g) and explain your answer"

Can someone please guide me through this question? Can I just assume that delta S is positive, since there is a gas on the reactants side and gases have a higher entropy than solids?

Can someone please guide me through this question? Can I just assume that delta S is positive, since there is a gas on the reactants side and gases have a higher entropy than solids?