Chemical Thermodynamics Question 477
Question: In an adiabatic process non-transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.
Options:
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 $
Show Answer
Answer:
Correct Answer: A
Solution:
- 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.
