How much energy is required to vaporize 98.6 g of ethanol (C 2H5OH) at its boiling point, if its ΔH vap is 40.5 kJ/mol?
A) 39.9 kJ
B) 11.5 kJ
C) 52.8 kJ
D) 86.7 kJ
E) 18.9 kJ
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