Direction: A football was inflated to a gauge pressure of 1 bar when the ambient temperature was 15°C. When the game started next day, the air temperature at the stadium was 5°C. Assume that the volume of the football remains constant at 2500 cm3.
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The entropy changes for the universe during the process in kJ/K is
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- 0.4652
- 0.0067
- 0
- –0.6711
Correct Option: A
dQ = dU + dW
For isothermal process,
dU = 0
∴ dQ = dW
| ds = | - | |||
| T | T |
| = | = 0.4652 kJ/K | 298 |
