Enthalpy and Heat

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rachelle1K
Posts: 109
Joined: Sat Sep 07, 2019 12:16 am

Enthalpy and Heat

Postby rachelle1K » Tue Feb 11, 2020 9:42 am

What is the difference between H and q? When would they be equal?

Wendy 1E
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Joined: Sat Aug 17, 2019 12:17 am
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Re: Enthalpy and Heat

Postby Wendy 1E » Tue Feb 11, 2020 10:25 am

Enthalpy (ΔH) is the measure of heat released or absorbed at a constant pressure. q is just heat under any conditions. ΔH would be equal to q only when the heat is released or absorbed at a constant pressure.

Alan Cornejo 1a
Posts: 98
Joined: Fri Aug 30, 2019 12:15 am

Re: Enthalpy and Heat

Postby Alan Cornejo 1a » Sun Mar 15, 2020 7:15 am

Wendy Perez 1E wrote:Enthalpy (ΔH) is the measure of heat released or absorbed at a constant pressure. q is just heat under any conditions. ΔH would be equal to q only when the heat is released or absorbed at a constant pressure.


This is the correct answer, another way to think about it is that you can use the two terms interchangeably when their is no work being done on the system .

ValerieChavarin 4F
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Joined: Wed Sep 18, 2019 12:18 am

Re: Enthalpy and Heat

Postby ValerieChavarin 4F » Sun Mar 15, 2020 7:17 am

enthalpy is the change in heat at constant pressure (at which is can be equal to ), while q is measure of heat under varying conditions.

saigorijavolu2k
Posts: 108
Joined: Sat Sep 28, 2019 12:15 am

Re: Enthalpy and Heat

Postby saigorijavolu2k » Sun Mar 15, 2020 7:29 am

Enthalpy is the change in how much heat there is under constant pressure, while heat is the transfer of energy caused by a temp difference


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