Reaction Enthalpy


Moderators: Chem_Mod, Chem_Admin

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?

LedaKnowles2E
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Reaction Enthalpy

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

What's delta U?

Nada AbouHaiba 1I
Posts: 77
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

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

Athena L 1B
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

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.


Return to “Concepts & Calculations Using First Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 2 guests