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### enthalpy vs heat

Posted: Sat Jan 13, 2018 7:58 pm
is there a difference between enthalpy and heat?

### Re: enthalpy vs heat

Posted: 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.

### Re: enthalpy vs heat

Posted: 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.