Question

How does the entropy change in the reaction `2C_3H_6(g) + 9O_2(g) -> 6CO_2(g) + 6H_2O(g)`?

Answer 1

Would you not expect the entropy to increase?

Explanation:

You has `12*mol` of gaseous products, and `11*mol` of gaseous reactants. `DeltaS^@`, which could certainly be approached quantitiatively given `S^@` for products and reactants, would certainly be POSITIVE.