enthalpy

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Renee Grange 1I
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enthalpy

Postby Renee Grange 1I » Sun Feb 02, 2020 11:58 pm

What is enthalpy?

Deepika Reddy 1A
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Joined: Thu Jul 11, 2019 12:15 am

Re: enthalpy

Postby Deepika Reddy 1A » Mon Feb 03, 2020 12:06 am

Enthalpy is the heat of the reaction. If it is negative, then the reaction is exothermic. If it is positive, then the reaction is endothermic.

005206171
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Joined: Wed Sep 18, 2019 12:20 am

Re: enthalpy

Postby 005206171 » Mon Feb 03, 2020 12:22 am

At constant pressure, enthalpy is the amount of heat released or absorbed by the reaction.

Amy Pham 1D
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Re: enthalpy

Postby Amy Pham 1D » Mon Feb 03, 2020 10:40 am

Meredithe DeGuzman4G wrote:At constant pressure, enthalpy is the amount of heat released or absorbed by the reaction.

Further, this is because at constant pressure the volume of reactants equals the volume of products, meaning that there was no expansion work in the reaction and the work term (w) in the equation equals zero.

Kavya Immadisetty 2B
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Re: enthalpy

Postby Kavya Immadisetty 2B » Mon Feb 03, 2020 10:43 am

Enthalpy is the amount of heat absorbed or released by a reaction if there is no expansion work

005162902
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Re: enthalpy

Postby 005162902 » Mon Feb 03, 2020 4:52 pm

Renee Grange 1I wrote:What is enthalpy?


Enthalpy is the heat entering or exiting the system. If the change in enthalpy (delta H) is negative then the reaction is exothermic. If the change in enthalpy is positive, then the reaction is gaining heat and therefore endothermic.

Kayli Choy 2F
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Joined: Sat Aug 24, 2019 12:17 am

Re: enthalpy

Postby Kayli Choy 2F » Wed Feb 05, 2020 1:28 pm

Furthermore, enthalpy is a state property, which means that it is not dependent on the path take to obtain that state. Therefore, you can add/subtract enthalpies to find the total change in enthalpy.

605395381
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Re: enthalpy

Postby 605395381 » Wed Feb 05, 2020 5:19 pm

Enthalpy is the amount of heat released or absorbed when the rxn is at a constant pressure


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