A) \[q=0,\Delta T,w=0\]
B) \[q\ne 0,\Delta T=0,w=0\]
C) \[q=0,\Delta T=0,w=0\]
D) \[q=0,\Delta t<0,w\ne 0\]
Correct Answer: A
Solution :
| [a] Free expansion \[w=0\] |
| adiabatic process \[q=0\] |
| \[\Delta U=q+w=0,\] this means internal energy remains constant. |
| \[\therefore \] \[\Delta t=0\] |
| In ideal gas there is no intermolecular attraction. Hence such a gas expands under adiabatic conditions into a vaccum no heat is absorbed or evolved since no external work is done to seperate the molecules. |
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