Let,
S = S(V, p) |
1.123 |
Hence,
|
1.124 |
Now,
|
1.125 |
|
1.126 |
or,
|
1.127 |
Again,
|
1.128 |
|
1.129 |
Again,
|
1.130 |
|
1.131 |
or,
|
1.132 |
But,
|
1.133 |
Hence, Eq. (1.132) can be written as
|
1.134 |
Hence we obtain,
|
1.135 |
This is known as the third T - dS relation.