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(a) (i) Derive an expression to calculate entropy change for an ideal gas when the temperature changes from T to T and pressure changes

 

(a) (i) Derive an expression to calculate entropy change for an ideal gas when the temperature changes from T to T and pressure changes from P to P2. [8] (ii) Calculate AS when 28 gm of N gas expands reversibly from 2 litres to 20 litres at 27C. [2] (b) Derive the following relations [10] (JA)), . =-P

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