Some vapor pressure data for Freon-12, once a common refrigerant, are 2.0 atm; 5.0 atm; 42.4 10.0 atm; 20.0 atm. Also, Use these data to plot the vapor pressure curve of Freon-12. What approximate pressure would be required in the compressor of a refrigeration system to convert Freon- 12 vapor to liquid at ?
Chapter 14 Part 2 Solution process 1. ΔHsolute>0 ΔHsolvent>0 ΔHmix<0 Heat of Hydration ionic compounds, water overcome, energy water and ions attractive forces, ions=lattice E ΔHsolute= ΔHlatticeE attractive fprces in water, H bonds ion and water= ion dipole ΔHhydration=heat released/mol gas=ΔHsolvent+ΔHmix Ion Dipole ionshydrated, formation is exothermic Heat of Solution, Ionic ΔHsolution=ΔHsolute+ΔHsolvent+ΔHmix ΔHsolution= ΔHlatticeE+ΔHsolvent+ΔHmix ΔHsolution= ΔHlatticeE+ΔHhydration ΔH solution and ΔHhydration exothermic, lattice E sign ΔHsolution tells ΔHhydration ΔHhydrationΔHlattice, ΔH solution exothermic example 1: 21500=ΔH583= 604 kJ/mol=ΔHlattic
