How much heat must be spent on the evaporation of 200 g of ether taken at a temperature of 35 degrees.

Initial data: m (ether mass) = 200 g or 0.2 kg; t (the initial temperature of the ether, corresponds to the temperature of vaporization) = 35 ºС.

Reference data: L (specific heat of vaporization of ether) = 0.4 * 10 ^ 6 J / kg.

The amount of energy that needs to be spent on the evaporation of the ether is determined by the formula: Q = m * L.

Let’s perform the calculation: Q = 0.2 * 0.4 * 10 ^ 6 = 0.08 * 10 ^ 6 J = 80 kJ.

Answer: For the evaporation of ether, it is necessary to expend 80 kJ of energy.

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