Enthalpy

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Chloe Alviz 1E
Posts: 102
Joined: Sat Aug 17, 2019 12:17 am

Enthalpy

Postby Chloe Alviz 1E » Sun Feb 02, 2020 9:16 pm

When exactly does enthalpy equal "q"? Are there certain conditions we need to follow?

Andrew Pfeiffer 2E
Posts: 101
Joined: Sat Sep 28, 2019 12:16 am

Re: Enthalpy

Postby Andrew Pfeiffer 2E » Sun Feb 02, 2020 9:19 pm

If there is no non-expansion work done on the system and the pressure is still constant, then the heat consumed or released by the system will be equal to q.

JohnWalkiewicz2J
Posts: 103
Joined: Thu Jul 11, 2019 12:17 am
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Re: Enthalpy

Postby JohnWalkiewicz2J » Sun Feb 02, 2020 9:32 pm

In terms of enthalpy, ΔH = q only when pressure is constant.

Janet Nguy 2C
Posts: 115
Joined: Sat Aug 24, 2019 12:17 am

Re: Enthalpy

Postby Janet Nguy 2C » Sun Feb 02, 2020 9:32 pm

q = enthalpy when the pressure is constant, such as in an open system.

ABombino_2J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Enthalpy

Postby ABombino_2J » Sun Feb 02, 2020 9:36 pm

q=enthalpy only when the pressure is constant because no other work is being done.

Areena H 2K
Posts: 81
Joined: Wed Dec 05, 2018 12:18 am

Re: Enthalpy

Postby Areena H 2K » Sun Feb 02, 2020 10:49 pm

When q equals delta H that means that pressure is constant in the system. There is also no other work being done on the system.

Dina Marchenko 2J
Posts: 54
Joined: Thu Jul 25, 2019 12:16 am

Re: Enthalpy

Postby Dina Marchenko 2J » Mon Feb 03, 2020 12:52 pm

How does enthalpy or change in enthalpy relate to q when pressure isn't constant?

Maya Beal Dis 1D
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Joined: Sat Aug 17, 2019 12:16 am
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Re: Enthalpy

Postby Maya Beal Dis 1D » Tue Feb 04, 2020 10:41 am

Do we need to memorize the table in the textbook that tells you which fraction to multiply R by based on if the reactant is an atom or molecule and so forth?


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