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: Δ_vapH = 33.9 kJ mol^-1
Δ_fusH = 9.8 kJ mol^-1
C_liq = 1.73 J g^-1 °C^-1
C_gas = 1.06 J g^-1 °C^-1
C_sol = 1.51 J g^-1 °C^-1
T_melting = 279.0 K
T_boiling = 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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