## Heat of Vaporization

Maria Davila 2I
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

### Heat of Vaporization

For question 7.35 in the textbook it asks to find the enthalpy of vaporization for $CH_4(l)$ . What is given is the 0.579 mol of $CH_4(l)$ and the heat required 4.76kJ. The solution manuals offers that
$\Delta H_v_a_p = \frac{q (heat)}{n (mol)}$
Would the equation used to solve this problem be $Q= n*H_v_a_p$ ?

Just wanted to clarify .

Justin Le 2I
Posts: 142
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Heat of Vaporization

Yes you could use that equation, but I think the equation that the solutions manual is easier to understand and you don't have to memorize. Enthalpies of vaporization and fusion are always given in kJ/mol, so if you use the first equation then the units make sense.

Maria Davila 2I
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Heat of Vaporization

Thank you Justin, that makes it easier to understand (looking at the units). Thanks !