Standard enthalpy of vapourisation ΔvapH° for water at 100°C is 40.66 kJ mol⁻¹. The internal energy of vapourisation of water at 100°C (in kJ mol⁻¹) is
- A+43.76
- B+40.66
- C+37.56
- D−43.76
✓ Correct answer: C
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