Chemistry-
General
Easy
Question
Consider the process carried out for an ideal gas.
One by one, stoppers S1, S2, S3............ are removed slowly and the gas expands to V2, L with final pressure P2and final temperature T2. Which of the following is/are correct for the above process.
- T1=T2
- P1=P2
- U1=U2
- w = 0, q =0
The correct answer is: P1=P2
It look as if process is reversible as it is carried out in small steps. But Pex = 0, so w = 0 The wall is diathermic, so process is isothermal. Hence, T1 = T2; So, 
U = 0 ; So, U2 = U1 As gas has expanded without change in temperature, so pressure has decreased. U = q + w ; So, q =
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