Question 1 The molar volume of a certain solid is 122.0 cm3 mol-1 at 1.00 and 483.15 K, its melting temperature. The molar volume of the liquid at this temperature and pressure is 142.6 cm mol At 1.29 MPa the melting temperature changes to 485.34 K. Calculate the enthalpy of fusion of the solid. O A. 10.9 mol 1 O B. 5.27 mol-1 OC 11.0 mol-1 OD.5.30 mol-1 O E. 6.09 mol-1

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Calculate the heat energy released when 22.1 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point. Constants for mercury at 1 atm 28.0 heat capacity of Hg(1) melting point enthalpy of fusion J/(mol-K) 234.32 K 2.29 kJ/mol 4p= kJ

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