## Enthalpy Calculations

Brandon Tao 1K
Posts: 100
Joined: Sat Aug 17, 2019 12:15 am

### Enthalpy Calculations

Will we need to memorize the enthalpy formulas for phase changes such as liquid to vapor?

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

### Re: Enthalpy Calculations

I am assuming that if we were asked to calculate enthalpy of a reaction, either the enthalpy of formation or bond enthalpies would be given to us in the problem.

Aiden Metzner 2C
Posts: 104
Joined: Wed Sep 18, 2019 12:21 am

### Re: Enthalpy Calculations

I doubt we will have to memorize any formulas as in most Lavelle classes the formulas are all provided on the test.

RasikaObla_4I
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

### Re: Enthalpy Calculations

I think you should just know that the enthalpy is positive for all the phase changes.

Shimei_2F
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

### Re: Enthalpy Calculations

I think it's helpful to know the generic formulas for liquid to vapor, solid to liquid, and solid to vapor which make up the formula (Delta H sublimation)=(Delta H fusion) + (Delta H vapor).

Gerald Bernal1I
Posts: 102
Joined: Thu Jul 11, 2019 12:16 am

### Re: Enthalpy Calculations

The only formula on the Constants and equations sheet is the third method equation. The rest will probably have to be memorized.