Question

Calculate the entropy change of the combustion of methane. Given the entropy of the reactant is -95 J/K and the entropy of the product is 205 J/K.

Answer 1

What dont you understand in this problem?

Answer 2

first issue: the entropy of anything can only be zero or more positive than zero. so let's assume "-95" a typo.

second issue: there are two products in a usual combustion reaction, carbon dioxide and water. however, the "product" you mentioned as an entropy value that looks suspiciously like the standard entropy of O2 in gas phase.

i looked up the standard entropies of the reactants and the products, and it doesn't look like the "95" and "205" you quoted are sums of entropies either; the ratio is off.

i give up.