The amount of heat will be released during the condensation of 500 g of acetone with a temperature

The amount of heat will be released during the condensation of 500 g of acetone with a temperature of 57 degrees and subsequent cooling to 17 degrees.

Initial data: m (weight of acetone) = 500 g = 0.5 kg; t1 (initial temperature of acetone, temperature of vaporization) = 57 ºС; t2 (final cooling temperature) = 17 ° C.

Reference data: L (specific heat of vaporization of acetone) = 525 kJ / kg = 525 * 10 ^ 3 J / kg; C (specific heat) = 2.22 kJ / (kg * K) = 2.22 * 10 ^ 3 J / (kg * K).

The released amount of heat: Q = L * m + C * m * (t1 – t2) = m * (L + C * (t1 – t2)) = 0.5 * (525 * 10 ^ 3 + 2.22 * 10 ^ 3 * (57 – 17)) = 306 900 J or 306.9 kJ.