What amount of heat is needed to turn 20 g of ether into vapor taken at a temperature of 15 ° C?

Initial data: m (ether mass) = 20 g = 0.02 kg; tн (initial temperature of the ether) = 15 ºС.

Reference data: C (specific heat) = 2350 J / (K * kg)); L (specific heat of vaporization) = 0.4 * 10 ^ 6 J / kg; t steam (vaporization temperature) = 35 ° C.

Q = Q1 (heating) + Q2 (vaporization) = C * m * (tp – tn) + L * m = m * (C * (tp – tn) + L).

Let’s perform the calculation:

Q = 0.02 * (2350 * (35 – 15) + 0.4 * 10 ^ 6) = 8940 J.

Answer: For the vaporization of ether, 8940 J of heat is needed.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.