## enthalpy vs heat

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

### enthalpy vs heat

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

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

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.

Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

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