## Enthalpy vs. Heat

$\Delta U=q+w$

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Labiba Sardar 2A
Posts: 103
Joined: Sat Jul 20, 2019 12:15 am

### Enthalpy vs. Heat

Can someone explain what the difference is between enthalpy and heat? I'm a little confused between the two.

Sarah Blake-2I
Posts: 153
Joined: Fri Aug 30, 2019 12:16 am

### Re: Enthalpy vs. Heat

Heat is the transfer of energy that occurs with an increase in temperature. Enthalpy, however, is the change in heat at constant pressure. Enthalpy is also a state function. Both occur when there is work being done to the system.

Lauren Stack 1C
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

### Re: Enthalpy vs. Heat

Heat is defined to be the transfer of energy due to a temperature difference. Enthalpy was defined to be the heat released or absorbed in chemical reactions and physical changes at a constant pressure.

PranaviKolla2B
Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

### Re: Enthalpy vs. Heat

Does anyone have any good videos explaining enthalpy and the related equations?

Kayla Maldonado 1C
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Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 1 time

### Re: Enthalpy vs. Heat

PranaviKolla2B wrote:Does anyone have any good videos explaining enthalpy and the related equations?

https://www.khanacademy.org/science/che ... v/enthalpy

Ashley Wang 4G
Posts: 103
Joined: Wed Sep 11, 2019 12:16 am

### Re: Enthalpy vs. Heat

To add onto the responses above, that is why when a reaction occurs under conditions of constant pressure, the heat given off/absorbed by the reaction is the change in enthalpy of the system.

lauraxie2e
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

### Re: Enthalpy vs. Heat

Enthalpy is when pressure is held constant.

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