question_answer

Water exists in liquid phase at \[\mathbf{30}{}^\circ \mathbf{C}\] at 1 atmospheric pressure. How would you convert this water to vapour form without increasing its temperature?

Answer:

                Water at \[\text{3}0{}^\circ \text{C}\] can be converted into vapour by reducing its pressure until it equals the vapour pressure of water at\[\text{3}0{}^\circ \text{C}\]. This route is along a vertical line on the P-T diagram, with \[\text{T }=\text{ 3}0{}^\circ \text{C}\].