If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl 2 F 2 as the heat transfer fluid. The normal boiling point of CCl 2 F 2 is −29.8 °C, and the enthalpy of vaporization is 20.11 kJ/mol. The gas and the liquid have molar heat capacities of 117.2 J/mol · K and 72.3 J/mol · K, respectively. How much energy is evolved as heat when 20.0 g of CCl 2 F 2 is cooled from +40 °C to −40 °C?
If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl 2 F 2 as the heat transfer fluid. The normal boiling point of CCl 2 F 2 is −29.8 °C, and the enthalpy of vaporization is 20.11 kJ/mol. The gas and the liquid have molar heat capacities of 117.2 J/mol · K and 72.3 J/mol · K, respectively. How much energy is evolved as heat when 20.0 g of CCl 2 F 2 is cooled from +40 °C to −40 °C?
Solution Summary: The author explains that the total energy evolved is the sum of the heat required to cool the gas from 40.0 °C to its boiling point.
If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl2F2 as the heat transfer fluid. The normal boiling point of CCl2F2 is −29.8 °C, and the enthalpy of vaporization is 20.11 kJ/mol. The gas and the liquid have molar heat capacities of 117.2 J/mol · K and 72.3 J/mol · K, respectively. How much energy is evolved as heat when 20.0 g of CCl2F2 is cooled from +40 °C to −40 °C?
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