In which case can you get more heat: burning 15 kg of peat or 6 kg of anthracite?

Task data: m1 (mass of peat taken) = 15 kg; m2 (mass of anthracite taken) = 6 kg.

Reference values: q1 (specific heat of combustion of peat) = 1.4 * 10 ^ 7 J / kg; q2 (specific heat of combustion of anthracite) = 3 * 10 ^ 7 J / kg.

To determine the greater amount of heat from combustion of the taken fuel, we will use the inequality: Q1> Q2.

q1 * m1> q2 * m2.

15 * 1.4 * 10 ^ 7> 6 * 3 * 10 ^ 7.

21 * 10 ^ 6> 18 * 10 ^ 7 (correct).

Answer: More heat can be obtained from burning 15 kg of peat.