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positive or negative values

Posted: Fri Jan 22, 2016 9:55 pm
by Crystal Escobar 1F
How do we determine whether a the values of w, q, or U are negative or positive?

Re: positive or negative values

Posted: Sat Jan 23, 2016 2:35 pm
by Spencer Johnson 1C
It usually depends on the wording of the question. For example, if heat is absorbed by the system q is positive and the reaction is endothermic but if heat is released then q is negative and the reaction is exothermic.