If your air conditioner is more than several years old, it may use the chlorofluorocarbon CCl2 F2 as the heat transfer fluid. The normal boiling point of CCl2 F2 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 16.6 g of CCl₂ F2 is cooled from +38.0 °C to -48.0 °C? Energy evolved =

The chlorofluorocarbon C2Cl3F3 has a normal boiling point of 47.6 ºC.  The specific heats of liquid C2Cl3F3 and gaseous C2Cl3F3 are, respectively, are 0.91 J/g-K and 0.67 J/g-K.  The molar heat of vaporization of C2Cl3F3 is 27.49 kJ/mol.  Consider a 50.0 g sample of the liquid CFC at 5.0 ºC.  How much heat is required to form gaseous C2Cl3F3 at 80.0 ºC?     Question 11 options:   A)  8.19 kJ   B)  1454 kJ   C)  30.51 kJ   D)  3031 kJ   E)  10.36 kJ

Also the answer is not 123.31 kj . Can you please explain step by step

A 0.544 g sample of steam at 103.3 ∘C is condensed into a container with 5.90 g of water at 14.2 ∘C. What is the final temperature of the water mixture if no heat is lost? The specific heat of water is 4.18  J g⋅ ∘C, the specific heat of steam is 2.01  J g⋅ ∘C, and Δ?vap=40.7 kJ/mol.