A) increases by 250 J
B) decreases by 250 J
C) increases by 50 J
D) decreases by 50 J
Correct Answer: A
Solution :
[a] As we know, \[\Delta Q=\Delta U+\Delta W\] (1st law of thermodynamics) \[\Rightarrow \Delta Q=\Delta U+P\Delta V\] or \[150=\Delta U+100\left( 1-2 \right)=\Delta U-100\] \[\therefore \Delta U=\text{ }150+100=250\text{ }J\] Thus the internal energy of the gas in- creases by 250 JYou need to login to perform this action.
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