Consider the following liquid - vapour equilibrium.
Liquid ``\rightleftharpoons`` Vapour
Which of the following relations is correct ?
(1) ``\frac {dlnG}{dT^2}``=``\frac {\triangle H_v}{RT^2}``
(2)``\frac {dlnP}{dT}``=``\frac {-\triangle H_v}{RT}``
(3)``\frac {dlnP}{dT^2}``=``\frac {-\triangle H_v}{T^2}``
(4) ``\frac {dlnP}{dT}``=``\frac {\triangle H_v}{RT^2}``