Calculate the Amount of Heat Energy, in Units of Kilojoules

Multiple Choice

Calculate the amount of heat energy, in units of kilojoules, required to convert 50.0 g of liquid ethanol, CH₃CH₂OH, at 25.5°C to gaseous ethanol at 92.0°C. (C_{ethanol liquid} = 2.44 J/g°C; C_{ethanol gas} = 1.42 J/g°C; molar heat of vaporization of liquid ethanol = 3.86 × 10⁴ J/mol. The boiling point of ethanol is 78.4°C and its molar mass is 46.07 g/mol.)

A) 49.2 kJ
B) 1.93 × 10³ kJ
C) 0.862 kJ
D) 1.35 × 10² kJ
E) 2.67 kJ