The 5 liter tank is filled with gasoline. Is this amount of gasoline enough to get 23 * 10 ^ 7 J of energy when it burns?

The amount of energy that will be released during the complete combustion of gasoline can be calculated using the formula:
Q = q * m, where q is the specific heat of combustion of gasoline (q = 44 MJ = 44 * 10 ^ 6 J / kg), m is the mass of gasoline (m = ρ * V, ρ is the density of gasoline (ρ = 750 kg / m³), V is the volume of gasoline (V = 5 l = 5 * 10-³ m³)).
The amount of energy released during combustion:
Q = q * m = q * ρ * V = 44 * 10 ^ 6 * 750 * 5 * 10-³ = 16.5 * 10 ^ 7 J.
Because 16.5 * 10 ^ 7 <23 * 10 ^ 7, then 5 liters of gasoline will not be enough to obtain the required amount of energy.