Question

Which of the following statement(s) is/are false:

• A. $△Sfor{N}_2\left(g\right)\to 2N\left(g\right)$ is positive
  
• B. $△G_{system}$ is always zero for a reversible process in a closed system
  
• C. $△G^o$ for an ideal gas is a function of temperature and pressure
  
• D. entropy of a isolated system is always maximized at equilibrium

Answer 1

Answer: (B), (C)

The correct options are
B $△G_{system}$ is always zero for a reversible process in a closed system

C $△G^o$ for an ideal gas is a function of temperature and pressure


Statement 1 True,
As no. of moles of gas increasing, so entropy would increase.
Hence, $△S>0$

Statement 2 False,
As $\Delta G$ is 0 only at equilibrium.

Statement 3 False,
As we know at equilibrium $\Delta G=0$ so,
$△G^o=-RTlnK$
Clearly, $\Delta G$ is only function of Temperature

Statement 4 True,
From Principle of maximum entropy which states that,
The entropy of an isolated system (closed system with fixed internal energy) is maximum at equilibrium.

Hence wrong statements are B,C