Freon-12 (CC12F2) is banned as a refrigerant because it is harmful to the ozone. a. Sketch the phase diagram of CCl2F2 using the physical constants below Normal boiling point = -29.8 °C Normal melting point = -158 °C Critical temperature = 112 °C Critical pressure = 40.8 atm Triple point (2.42 ×10-6 atm, -157 °C) %3D

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1. Freon-12 (CCl2F2) is banned as a refrigerant because it is harmful to the ozone.
a. Sketch the phase diagram of CCl2F2 using the physical constants below
Normal boiling point = -29.8 °C
Normal melting point = -158 °C
Critical temperature = 112 °C
Critical pressure = 40.8 atm
Triple point (2.42 ×10-6 atm, -157 °C)
b. Calculate the heat required to bring 10.0g CCl2F2 from -29.8 °C as a liquid to the
gas phase at 10.0 °C. (molar mass
120.91 g/mol)
Cs (gas) = 0.074 kJ/mol·K
AHvap = 20.1 kJ/mol
AHfus = 4.14 kJ/mol
Transcribed Image Text:1. Freon-12 (CCl2F2) is banned as a refrigerant because it is harmful to the ozone. a. Sketch the phase diagram of CCl2F2 using the physical constants below Normal boiling point = -29.8 °C Normal melting point = -158 °C Critical temperature = 112 °C Critical pressure = 40.8 atm Triple point (2.42 ×10-6 atm, -157 °C) b. Calculate the heat required to bring 10.0g CCl2F2 from -29.8 °C as a liquid to the gas phase at 10.0 °C. (molar mass 120.91 g/mol) Cs (gas) = 0.074 kJ/mol·K AHvap = 20.1 kJ/mol AHfus = 4.14 kJ/mol
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