How Much Energy Must Be Removed from a 94

question 103

Multiple Choice

How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g/mol) at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful.
ΔH_vap = 33.9 kJ/mol
ΔH_fus = 9.8 kJ/mol
C_liq = 1.73 J/g°C
C_gas = 1.06 J/g°C
C_sol = 1.51 J/g°C
T_melting = 279.0 K
T_boiling = 353.0 K

• A) 17.6 kJ
• B) 11.8 kJ
• C) 70.2 kJ
• D) 10.5 kJ
• E) 29.4 kJ

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