## Dimensional Analysis for Energy Required (HW Problem 7.47)

Erika Monasch 4I
Posts: 5
Joined: Fri Sep 26, 2014 2:02 pm

### Dimensional Analysis for Energy Required (HW Problem 7.47)

For the homework problem 7.47, the answer key indicates that to get the amount of energy required by the automobile in a year, you must multiply by 5471 KJ/mol. Where did this number come from?

Niharika Reddy 1D
Posts: 127
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Dimensional Analysis for Energy Required (HW Problem 7.4

In the problem, it is stated that we should assume the enthalpy of combustion of gasoline can be approximated by that of octane. This value is -5471 kJ/mol.