Determine the amount of heat that is needed to steam 100 g of ether taken at a temperature of 15C.

Data: m (mass of ether) = 100 g = 0.1 kg; t0 (temperature at which the ether was taken) = 15 ºС.

Reference values: tpap (vaporization temperature) = 35 ºС; C (specific heat) = 2350 J / (kg * K); L (specific heat of vaporization) = 0.4 * 10 ^ 6 J / kg.

The required amount of heat for the conversion of ether into steam: Q = C * m * (tpap – t) + L * m.

Calculation: Q = 2350 * 0.1 * (35 – 15) + 0.4 * 10 ^ 6 * 0.1 = 44 700 J or 44.7 kJ.

Answer: To convert 100 g of ether into steam, 44.7 kJ of heat is required.