Page 1 of 1

4.7 - does water result as a gas or vapor in combustion?

Posted: Mon Feb 03, 2020 11:24 pm
by Sue Bin Park 2I
in part a of the question, the answer key's result requires you to assume that water vapor is produced in the reaction (to get the right delta n of gaseous products). however, in part b to get the provided solution you have to use the enthalpy of formation of liquid water to get the "correct" answer. is this a discrepancy in the book? (i'm going off of the back of the book). or do i not know some convention about combustion rxns?

Re: 4.7 - does water result as a gas or vapor in combustion?  [ENDORSED]

Posted: Thu Feb 06, 2020 1:10 pm
by Chem_Mod
Under standard conditions water is a liquid.

Assume standard conditions apply unless the information given states otherwise.