A 2.00g sample of C2H5OH undergoes condensation. The molar enthalpy of vaporization, ΔHvap, of C2H5OH is +38.6kJ/mol. Which of the following best identifies the change in enthalpy in the phase transition?
A) +19.3 kJ
B) +77.2 kJ
C) -19.3 kJ
D) -77.2 kJ
