Question

Freon-11, CCl3F has been commonly used in air conditioners. It has a molar mass of 137.35 g/mol and its enthalpy of vaporization is 24.8 kJ/mol at its normal boiling point of 24C. Ideally how much energy in the form of heat is removed from a room by an air conditioner that evaporates 1.00 kg of freon-11?

Answer 1

Answer:

180.56 Kilo joules of energy is removed in the form of heat when 1.00 kg of freon-11 is evaporated.

Explanation:

Molar mass of freon-11 = 137.35 g/mol

Enthalpy of vaporization of freon-11= $\Delta H_{vap}=24.8 kJ/mol$

Mass of freon-11 evaporated = 1.00 kg = 1000 g

Moles of freon-11 evaporated = $\frac{1000 g}{137.35 g/mol}=7.2807 mol$

Energy in the form of heat removed when 1.00 kg of freon-11 gets evaporated:

$7.28067 mol\times \Delta H_{vap}=7.2807 mol\times 24.8 kJ/mol$

$=180.56 kJ$