rxn enthalpy vs. rxn internal energy

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Kayla Danesh 1F
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rxn enthalpy vs. rxn internal energy

Postby Kayla Danesh 1F » Mon Jan 15, 2018 9:59 pm

Why is the reaction enthalpy less negative (more positive) than the reaction internal energy for reactions that generate gases? I am having trouble understanding this idea. Thanks.

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Re: rxn enthalpy vs. rxn internal energy

Postby AtreyiMitra2L » Mon Jan 15, 2018 10:09 pm

I think because we are supposed to be looking at it in terms of the absolute value. In chemistry, we always take the system's perspective. In physics, however, we usually take the surrounding's perspective. Because of this discepancy, we look at it in terms of absolute value. Please don't hesitate to correct me if I'm wrong!

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