[Aerosion]

Sorry for asking two questions in the same day.  I admit, I have something due Monday, and I'm...you know...sort of panicking.

Anyway, the question.

"Starting from the reaction

C₂H₅OH + 3O₂ -> 2CO₂ + 3H₂O

Find the heat and entropy change of the reaction when this reaction occurs at STP."

Okay, I know how to get entropy change (well, at least I know an equation:

q=Specific Heat x Change In Temperature x Mass

And I know that the STP that needs to be used is 22.4 L/mol.  However, I'm not sure how to get the heat, and I'm not sure how to use the entropy equation that I presented if there's not even a change in temperature listed.

Help would be appreciated.

[Yggdrasil]

The question isn't asking for heat in the standard sense, but it's asking for the change in enthalpy.  Both the change in entropy and the change in enthalpy can be calculated by using Hess's Law, which first requires finding standard entropies and enthalpies of formation (these will probably be in the appendix of your chemistry book).