For a compressible system, V, S, P and T are specific volume, specific entropy, pressure and temperature respectively. As per Maxwell's relation

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BPSC AE Paper 5 (Mechanical) 25th March 2022 Official Paper
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Answer (Detailed Solution Below)

Option 1 :
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Detailed Solution

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Explanation:

If there is a relation between x, y & z, then z may be expressed as a function of x & y.

An equation of type dz = Mdx + Ndy  is exact differentials, it can be written as 

For a pure substance undergoing a reversible process, these equations hold true:

  1. dU = T.ds – p.dv
  2. dH = T.ds + v.dp
  3. dF = -p.dV – s.dT
  4. dG = v.dP –s.dT

They can be written as

These are known as Maxwell’s Equation.

Out of these options, 4 does not match with Maxwell’s Equation.

Other Maxwell relations are:

if x =  ϕ(y, z)

If F = ϕ(x, y, z)

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