How many megajoules are released when 9.0 gal of gasoline burns.

how do I start to do this problem, and what are the steps to get there.
thank you

2 answers

1. Write and balance the equation.
2. Use density gasoline to convert 9.0 gallons to grams.
3. Look up the heat of combustion or calculate it from the delta H formation values.
4. heat combustion x (grams gasoline/molar mass gasoline).

Post your work or supply details (numbers) if you run into trouble.
6.7mJ