Question

A gas is compressed at a constant pressure of \(50\text{ N/m}^2\) from a volume of \(10\text{ m}^3\) to a volume of \(4\text{ m}^3\). Energy of \(100\text{ J}\) is then added to the gas by heating. Its internal energy is

• A. Increases by \(400\text{ J}\)
• B. Increases by \(200\text{ J}\)
• C. Increases by \(100\text{ J}\)
• D. Decreases by \(200\text{ J}\)

Hint:

Use first law \(Q=\Delta U+W\), where \(W=P\Delta V\) is work done by the gas. Compression gives negative \(W\).

Answer 1

The Correct Option is A