A substance has a heat of fusion of 61.5 kJ/mol and a heat of deposition of -167.4 kJ/mol. What is the heat of sublimation in kJ/mol? -61.5 kJ/mol 61.5 + 167.4 kJ/mol 167.4 kJ/mol 61.5- 167.4 kJ/mol 167.4-61.5 kJ/mol According to the phase diagram given, which of the following statements is WRONG? At the temperature and pressure of point 1, substance W exists as a three-phase equilibrium system. If liquid W is maintained at the pressure of point 4 while the temperature is increased to 80 degree C, the liquid will vaporize. If the W(l) = W(g) system is maintained at the temperature of point 3 while pressure is decreased, more W will vaporize. At the temperature of point 2, a pressure of 500 torr is sufficient to liquify gaseous W. The existence of liquid W at -40 degree C and 500 torr represents the metastable condition of "supercooling."
Show transcribed image textA substance has a heat of fusion of 61.5 kJ/mol and a heat of deposition of -167.4 kJ/mol. What is the heat of sublimation in kJ/mol? -61.5 kJ/mol 61.5 + 167.4 kJ/mol 167.4 kJ/mol 61.5- 167.4 kJ/mol 167.4-61.5 kJ/mol According to the phase diagram given, which of the following statements is WRONG? At the temperature and pressure of point 1, substance W exists as a three-phase equilibrium system. If liquid W is maintained at the pressure of point 4 while the temperature is increased to 80 degree C, the liquid will vaporize. If the W(l) = W(g) system is maintained at the temperature of point 3 while pressure is decreased, more W will vaporize. At the temperature of point 2, a pressure of 500 torr is sufficient to liquify gaseous W. The existence of liquid W at -40 degree C and 500 torr represents the metastable condition of "supercooling."
A 23.20 g sample of liquid n-pentane is initially at -62.30 °C. If the sample is heated at constant pressure (P = 1 atm), calculate the amount of energy in kJ needed to raise the temperature of the sample to 58.10 °C.
2.) The following information is given for water, H2O, at 1 atm:
boiling point = 100 °C
Hvap(100 °C) = 40.7 kJ/mol
melting point = 0.00 °C
Hfus(0.00 °C) = 6.01 kJ/mol
specific heat liquid = 4.18 J/g°C
At a pressure of 1 atm, what is H in kJ for the process of condensing a 43.2 g sample of gaseous water at its normal boiling point of 100 °C.
3.) The following information is given for benzene, C6H6, at 1 atm:
boiling point = 80.1 °C
Hvap(80.1 °C) = 30.7 kJ/mol
melting point = 5.50 °C
Hfus(5.50 °C) = 9.95 kJ/mol
specific heat liquid = 1.74 J/g°C
At a pressure of 1 atm, _____ kJ of heat are needed to vaporize a 47.4 g sample of liquid benzene at its normal boiling point of 80.1 °C.