Given are statements for certain thermodynamic variables:
(A) Internal energy, volume $(V)$ and mass $(M)$ are extensive variables.
(B) Pressure $(P)$, temperature $(T)$ and density $(\rho)$ are intensive variables.
(C) Volume $(V)$, temperature $(T)$ and density $(\rho)$ are intensive variables.
(D) Mass $(M)$, temperature $(T)$ and internal energy are extensive variables.
Choose the correct answer from the options given below:
Answer: (D) (A) and (B) Only
Extensive variables depend on the amount of the system (they double when the system is doubled): mass, volume, internal energy.
Intensive variables do not: pressure, temperature, density.
- (A) correct.
- (B) correct.
- (C) wrong: volume is extensive.
- (D) wrong: temperature is intensive.
So (A) and (B) only.
Solution by Sreeraj P, M.Sc Physics