Question

according to the law of conservation of energy when a car uses 10000 J of chemical energy from gasoline how much of this energy will be transformed into mechanical sound or heat energy?

Answer 1

10,000 J is your correct answer.

Answer 2

Conservation of energy holds that all energy in a system will simply change state, and no more nor less energy will be created or lost during the operation of the system. In this case, then, all 10000 J of energy will be transformed during the operation of the car.