What is the change in internal energy of a car if you put 12.0 gal of gasoline into its tank? The energy content of gasoline is 1.3 × 108 J/gal. All other factors, such as the car’s temperature, are constant.
The change in internal energy of a car by 12 gal gasoline is,
= ( energy by one gal gasoline) ( number of gal of gasoline)