Kerosene is burned in the kerosene. The efficiency of the primus is 60%.

Kerosene is burned in the kerosene. The efficiency of the primus is 60%. How much heat will a pot of food, standing on a stove, receive when burning 10 g of kerosene.

Initial data: η (primus efficiency) = 60% (0.6); m1 (mass of burned kerosene) = 10 g (0.01 kg).

Reference data: q (specific heat of combustion of kerosene) = 4.6 * 10 ^ 7 J / kg.

The amount of heat that the pan with food will receive can be determined from the formula for calculating the efficiency: η = Q1 / Q2 = Q1 / (q * m), whence Q1 = η * q * m.

Let’s perform the calculation: Q1 = 0.6 * 4.6 * 10 ^ 7 * 0.01 = 276000 J (276 kJ).

Answer: A saucepan with food will receive 276 kJ of heat.