How Much Energy Must Be Removed from a 125 G

question 123

Multiple Choice

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g/mol) at 425.0 K to liquify the sample and lower the temperature to 335.0 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) 38.9 kJ
• B) 95.4 kJ
• C) 67.7 kJ
• D) 54.3 kJ
• E) 74.4 kJ

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Definitions:

Process Cost Accounting

An accounting method used to track and allocate costs of production by process or department.