Distinguish between an isothermal and adiabatic change.
Question 04: Distinguish between an isothermal and adiabatic change.
Answer:
Isothermal Change | Adiabatic Change |
1. A process in which the temperature of the working substance remains constant is called as isothermal process. | 1. A process in which the working substance neither receives, nor gives out heat is called as adiabatic process. |
2. During operation, the temperature of the working substance remains constant. | 2. In this process the amount of heat in the working substance remain constant. |
3. Heat exchange is allowed | 3. Heat exchange is not allowed |
4. It is a slow process | 4. It is a quick process |
5. There is no change in internal energy. | 5. Change in internal energy is equal to the work done. |
6. PV = Constant | 6. PVˠ = Constant |
7. Container should be good | 7. Vessel is perfect nonconductor of heat. |
8. Heat energy equation becomes
dQ = 0 + |
8. Heat energy equation becomes
0 = dU + |