Question
Question: A gas is compressed at a constant pressure of 50 N/m<sup>2</sup> from a volume of 10 m<sup>3</sup> t...
A gas is compressed at a constant pressure of 50 N/m2 from a volume of 10 m3 to a volume of 4 m3. Energy of 100 J is then added to the gas by heating. Its internal energy is –
A
Increased by 400 J
B
Increased by 200 J
C
Increased by 100 J
D
Decreased by 200 J
Answer
Increased by 400 J
Explanation
Solution
DQ = dU + dW
100 = dU + 50(4 – 10)
100 = dU – 300
dU=400Jincreases