How much gasoline needs to be burned to get 2.3 * 10 ^ 8 J of energy?

These tasks: Q (the amount of thermal energy that is required to be obtained from the combustion of gasoline) = 2.3 * 10 ^ 8 J.

Reference values: according to the condition q (specific heat of combustion of gasoline) = 4.6 * 10 ^ 7 J / kg.

We determine the mass of gasoline that needs to be burned from the formula: Q = q * m and m = Q / q.

Calculation: m = 2.3 * 10 ^ 8 / (4.6 * 10 ^ 7) = 5 kg.

Answer: To obtain 2.3 * 10 ^ 8 J of thermal energy, you need to burn 5 kg of gasoline.