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relationship between delta H and q

Posted: Tue Jan 17, 2017 12:48 pm
by Nick_Kopooshian_3C
When is delta H and q interchangeable?

Re: relationship between delta H and q  [ENDORSED]

Posted: Tue Jan 17, 2017 12:49 pm
by Cindy Flores 2C
Great question, delta H and q are interchangeable only when there is heat under constant pressure.

Re: relationship between delta H and q

Posted: Tue Jan 17, 2017 2:26 pm
by Jeannie_Kim_1I
Delta H is considered a specific type of q. Delta H=qp.

Re: relationship between delta H and q

Posted: Wed Jan 18, 2017 11:54 am
by Janice Kim 3I
If pressure is held constant, q will have a subscript p (qp), making it interchangeable with delta H.

Re: relationship between delta H and q

Posted: Wed Jan 18, 2017 12:28 pm
by Kevin Le 1L
Like the others said above, q and delta H are interchangeable only when a system is under constant pressure. However, we can calculate q using delta H during phase changes. q = (mass)(delta H at a phase change).