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### Example 8.7

Posted: Sat Jan 20, 2018 4:29 pm
Why is the equation to figure the change in enthalpy $\Delta H$ =(2mol)*q/n ? I understand the 2 mol comes from benzene but why do we have to do q/n?

### Re: Example 8.7

Posted: Sat Jan 20, 2018 4:42 pm
The units for ΔH are Joules. If you are trying to find the change in enthalpy (ΔH) for 2 mol of benzene, you need to multiply by q (J) in the numerator and n (mol) in the denominator to end up with the ΔH in Joules.

$\Delta H = \frac{(2 mol)\cdot (-8.60\cdot 551J)}{(0.113/78.12 mol)} = -6.55 \textrm{x} 10^{6} J$