# What amount of heat will be released during the condensation of 20 g

What amount of heat will be released during the condensation of 20 g of ether vapor taken at a temperature of 35 degrees, and its further cooling to a temperature of 10 degrees.

Data: m (mass of ether vapor) = 20 g (0.02 kg); t (ether vapor temperature, vaporization temperature) = 35 ºС; t1 (final ether temperature) = 10 ºС.

Reference values: L (specific heat of condensation of ether vapor) = 4 * 105 J / kg; C (specific heat of ether) = 2350 J / (kg * K).

The amount of heat is determined by the formula: Q = L * m + C * m * (t – t1).

Calculation: Q = 4 * 105 * 0.02 + 2350 * 0.02 * (35 – 10) = 9 175 J.

Answer: When the vapor condenses and the ether cools, 9 175 J of heat will be released.

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