[TD] THERMODYNAMICS MOST IMPORTANT S3 KTU QUESTION PAPERS FOR KTU STUDENTS [SECOND YEAR] Part - | |


THERMODYNAMICS MOST IMPORTANT QUESTIONS

[TD] THERMODYNAMICS MOST IMPORTANT S3 KTU QUESTION PAPERS FOR KTU STUDENTS [SECOND YEAR] Part - | |

PART A

1. State and Derive Clausius Theorem?

2. State the Inequality of Clausius?
      
3. Prove the Equality of Clausius to Kelvin Plank Statement?


PART B

4. One kg of ice at -5 c is exposed to he atmosphere which at 20 c. T he ice melt and comes into themal equilibrium with the atmosphere.

(a) determine the entropy increase of the universe.

(b) what is the minimum amount of work neccessary to convert the water back into ice at -5 c ? 

Cp of ice is 2.093kj/kgk and the latent of fusion of ice 333.3kj/kg.

5. Three identical finite bodies of constant heat capacity are the temperature 300k,300k and 100k. 
If no work or heat is supplied from outside. 

What is the highest temperature to which any one of the bodies can be raised by the operation ofheat engines of refrigerators?

6. Two identical bodies of constant heat capacity are the initial temperature T1 .

A refrigerator operation between these 2 bodies until one body is cooled to temperature T2.

If the bodies remain at constant  pressure and undergo no change of phase, show that the minimum amount of work needed to do this is W max=cp((Ti)'2/T2+T2-2Ti)

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