Question

There are two kinds of thermodynamic state variables - extensive and intensive.
Which of the following variables are intensive ?
(i)
Pressure
(ii) Volume
(iii) Internal energy
(iv) Temperature
OR​

Answer 1

Answer:

There are two thermodynamics state variables :

(1) Extensive and (2) Intensive

Extensive variables indicate the size of the system.

For examples : Internal energy U, volume V, total mass M and work.

Intensive variables does not indicate the pressure, temperature and dimension of a system. To decide which variable is extensive and which intensive, think of a relevant system in equilibrium and imagine that it is divided two equal parts. The variables that remain unchanged for each part are intensive. The variables whose values get halved in each part are extensive. It is easily seen.

For example, internal energy U, volume V, total mass M are extensive variables. Pressure P. temperature T and densityare intensive variations