Calculate the heat required in kJ for in the process of vaporizing 36.0 g of ethanol at 25°C to the vapor phase at 78°C. Write your answer using 2 significant figures


Date for ethanol: 
T_f = -114°C
T_b = 78°C
ΔH_fus = 5.02 kJ/mol
ΔH_vap = 38.56 kJ/mol
C_EtOH(s) = 0.97 J/g-K
C_EtOH(l)  = 2.3 J/g-K
C_EtOH(g)  = 2.03 J/g-K

• A. 16 kJ
• B. 25 kJ
• C. 42 kJ
• D. 35 kJ

Answer: (D)