Question

In a thermodynamic process, the pressure of a fixed mass of a gas is changed in such a manner that the gas releases 20 J of heat and 8 J of work is done on the gas. If the initial internal energy of the gas is 30 J, the final internal energy will be:

• A. \(2 \text{ J}\)
• B. \(42 \text{ J}\)
• C. \(18 \text{ J}\)
• D. \(58 \text{ J}\)

Hint:

Carefully follow sign convention for heat and work in thermodynamics.

Answer 1

The Correct Option is C