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Reaction Enthalpy

Posted: Thu Jan 31, 2019 7:40 pm
by Marsenne Cabral 1A
When a reaction goes from a solid to a liquid, why does delta H equal delta U?

Re: Reaction Enthalpy

Posted: Thu Jan 31, 2019 8:00 pm
by LedaKnowles2E
What's delta U?

Re: Reaction Enthalpy

Posted: Thu Jan 31, 2019 8:08 pm
by Nada AbouHaiba 1I
LedaKnowles2E wrote:What's delta U?

Delta U is the change in internal energy

Re: Reaction Enthalpy

Posted: Sat Feb 02, 2019 12:37 pm
by Athena L 1B
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.