Question
Chemistry Question on Thermodynamics
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 △U of the gas in joules will be
A
1136.25 J
B
- 500 J
C
–505 J
D
+505 J
Answer
–505 J
Explanation
Solution
The correct option is (C): –505 J.