the masses of compounds found in the engine the amount of heat in the engine the total mass of gasoline the total amount of energy
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When a car engine is started, gasoline is mixed with air and burned. Heat, sound, and chemical products are released. As the engine operates, which of these remains constant?
Possibilities:
- the masses of compounds found in the engine
- the amount of heat in the engine
- the total mass of gasoline
- the total amount of energy

the total amount of energy