A) determine the vapor pressure (in torr) of a substance at 36degrees C, whose normal boiling point is 84 degrees C and has a ΔHvap of 22.1 kJ/mol:
1. 147 torr, 2. 98 torr, 3. 239 torr, 4. 31.8 torr, 5. 41.8 torr
B) how much energy is required to heat 87.1 g acetone (molar mass=58.05 g/mol) from a solid at -154.0degress C to a liquid at -42.0 degrees C: other data ΔHfus=7.27 kJ/mol, Cliq= 2.16 J/g degrees C, Cgas= 1.29 J/g degrees C, Csol=1.65 J/gdegrees C, Tmelting=-95.0degrees C
1. 8.48kJ, 2. 29.4 kJ, 3. 32.2 kJ, 4. 18.5 kJ, 5. 9.97 kJ
C) Determine ΔHvap for a compound that has a measured vapor pressure 24.3 torr at 273 K and 135 torr at 325 K:
1. 34 kJ/mol, 2. 13 kJ/mol, 3. 24 kJ/mol, 4. 79 kJ/mol, 5. 41 kJ/mol