Question

What happens if liquid is heated to critical temperature of its vapour.

Answer 1

We know while high pressure and low temperature applied. A gas is goin to liquify. As we increase the temperature of gas liquifaction wll be difficult.. Coz more and higher pressure needed to overcome the increased kinetic energy of molecules.. So there comes the critical temperature...That is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied. Its the highesr temperature at which gas can exist as liquid. Above the critical temperature, the molecules have too much kinetic energy for the intermolecular attractive forces to hold them together in a separate liquid phase. Instead, the substance forms a single phase that completely occupies the volume of the container. Substances with strong intermolecular forces tend to form a liquid phase over a very large temperature range and therefore have high critical temperatures. Conversely, substances with weak intermolecular interactions have relatively low critical temperatures.