Chemistry

Problem

The enthalpy of vaporisation of water at

100^{\circ}\text{C}

40.63 \text{ KJ mol}^{-1}

. The value

\Delta U

for this process would be (1)

37.53 \text{ KJ mol}^{-1}

(2)

39.08 \text{ KJ mol}^{-1}

(3)

42.19 \text{ KJ mol}^{-1}

(4)

43.73 \text{ KJ mol}^{-1}