## Why isn't heat a state function?

$\Delta U=q+w$

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Elizabeth Ignacio 1C
Posts: 39
Joined: Fri Sep 29, 2017 7:07 am

### Why isn't heat a state function?

I'm having a hard time seeing the differences between heat and enthalpy. What happens when calculating heat that leads it to /not/ be a state function?

Tasnia Haider 1E
Posts: 55
Joined: Sat Jul 22, 2017 3:01 am

### Re: Why isn't heat a state function?

Heat is not an internal property of the system. It depends on the path taken to go from point A to point B which is why it's not a state function.

Annalise Eder 2L
Posts: 49
Joined: Sat Jul 22, 2017 3:01 am

### Re: Why isn't heat a state function?

Enthalpy is a state function meaning it does not matter what path was taken. It depends only on the initial and final states. Enthalpy requires constant pressure and measures the heat given off or taken up by a reaction. On the other hand, heat is a path function meaning it does depend on the path taken. Heat is a form of energy that can be added to a system.

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