enthalpy vs heat

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Ishita Monga 1B
Posts: 31
Joined: Thu Jul 27, 2017 3:00 am

enthalpy vs heat

Postby Ishita Monga 1B » Sat Jan 13, 2018 7:58 pm

is there a difference between enthalpy and heat?

Naomi Jennings 2H
Posts: 21
Joined: Thu Jul 13, 2017 3:00 am

Re: enthalpy vs heat

Postby Naomi Jennings 2H » Sat Jan 13, 2018 8:06 pm

Yes, because enthalpy is a state function and heat is a path function. The enthalpy value will be determined by the current state of the substance, whereas heat is defined by the textbook as "the energy that is transferred as a result of a temperature difference between a system and its surroundings". Pretty much, heat is discussing energy that is moving from substance a to substance b, but enthalpy is talking about the energy of substance a or of substance b.
However, they're pretty similar when talking about the change in enthalpy between substance a to b, because that energy is released or absorbed as heat.

Kellina Tran 2I
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

Re: enthalpy vs heat

Postby Kellina Tran 2I » Sat Jan 13, 2018 8:10 pm

I think the most simple way to think of it is that enthalpy is determined by the amount of heat released or absorbed, rather than by the substance heat itself.

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