question_answer

A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5 atm from an initial volume of 2.50 L to a final volume of 4.50 L. The change in internal energy \[\Delta U\] of the gas in joules will be [NEET-2017]

A)  +505 J            

B)       1136.25 J

C)  - 500 J

D)       - 505 J

Correct Answer: D

Solution :

[d]

For adiabatic process, q = 0