Chemistry - Real Gas Question with Solution | TestHub

Above $\mathrm{T}>374^{\circ }\mathrm{C}$ at any value of pressure, gas can not be converted into liquid.

Upon increasing the temperature density of vapours at dew point decreases.

At critical point;

$$\begin{gathered} \text{displaylines}{\left(\frac{\partial \mathrm{P}}{\partial {\mathrm{V}}_{\mathrm{m}}}\right)}_T=0 \\ {\left(\frac{{\partial }^2\mathrm{P}}{\partial {\mathrm{V}}_{\mathrm{m}}^2}\right)}_T=0 \end{gathered}$$

Upon increases the temperature density of liquid at bubble point decreases.