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How Much Energy Must Be Removed from a 125 G

Question 38

Multiple Choice

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g mol-1) at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful: ΔvapH = 33.9 kJ mol-1
ΔfusH = 9.8 kJ mol-1
Cliq = 1.73 J g-1 °C-1
Cgas = 1.06 J g-1 °C-1
Csol = 1.51 J g-1 °C-1
Tmelting = 279.0 K
Tboiling = 353.0 K


A) 38.9 kJ
B) 95.4 kJ
C) 67.7 kJ
D) 54.3 kJ
E) 74.4 kJ

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