The latent heat of vaporisation of a liquid is 850 kJ kg-1 and it has a molar mass of 0.046 kg mol-1.
What is the energy required to vaporise 45 moles45\text{ moles}45 moles of the liquid at its boiling point?
3.8×104 J3.8 \times 10^4\text{ J}3.8×104 J
1.8×106 J1.8 \times 10^6\text{ J}1.8×106 J
3.8×107 J3.8 \times 10^7\text{ J}3.8×107 J
8.3×108 J8.3 \times 10^8\text{ J}8.3×108 J