Reaction Enthalpy


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Marsenne Cabral 1A
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Reaction Enthalpy

Postby Marsenne Cabral 1A » Thu Jan 31, 2019 7:40 pm

When a reaction goes from a solid to a liquid, why does delta H equal delta U?
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LedaKnowles2E
Posts: 62
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Re: Reaction Enthalpy

Postby LedaKnowles2E » Thu Jan 31, 2019 8:00 pm

What's delta U?
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Nada AbouHaiba 1I
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Re: Reaction Enthalpy

Postby Nada AbouHaiba 1I » Thu Jan 31, 2019 8:08 pm

LedaKnowles2E wrote:What's delta U?

Delta U is the change in internal energy
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Athena L 1B
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Re: Reaction Enthalpy

Postby Athena L 1B » Sat Feb 02, 2019 12:37 pm

Since (delta U) = (delta H) - P(delta V), if there is no change in volume (which there isn't when you're going from a solid to a liquid), P(delta V) = 0. Therefore, delta U = delta H.
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