defined the following terms. (i) Isotherm (ii) Critical Temperature (iii) Critical Pressure (iv) Critical Volume

Explanation

(i) Isotherm :
At any constant temperature when pressure and wice versa. Such P-V curves at constant temperature are known as isotherms. (ii) Critical Temperature `(T_(C))`
It is defined as the charactersitic temperature of a gas above which no liquefaction occurs.
(iii) Critical Pressure `: (P_(C))`
It is defined as the minimum pressure required to liquefy 1 mole of a gas present at its critical temperature.
(iv) Ctritical volume: `(V_(C))`
The volume occupied by 1 mole of gas ideal behaviour is measured in termsof a ratio of PV to nRT thsi is termed as compressibility factor.
`Z=(PV)/(nRT)`