How much energy needs to be spent to turn 10 ml of alcohol at boiling point into steam.

Initial data: V (volume occupied by ether) = 10 ml; ether is at the temperature of vaporization (t = 35 ºС).

Reference data: L (specific heat of vaporization of ether) = 4 * 10 ^ 5 J / kg: ρ (density of ether) = 710 kg / m ^ 3.

SI system: V = 10 ml = 10 * 10 ^ -3 l = 10 * 10 ^ -3 dm ^ 3 = 10 * 10 ^ -6 m ^ 3.

1) Calculate the mass of ether for evaporation: m = ρ * V = 710 * 10 * 10 ^ -6 = 0.0071 kg.

2) Determine the required amount of energy for the vaporization of the ether: Q = L * m = 4 * 10 ^ 5 * 0.0071 = 2 840 J.