During an isothermal expansion, a confin

CUET Preparation Today

Start Free Mocks

Home Questions EQJFJXPST2

Target Exam

CUET

Subject

Physics

Chapter

Thermodynamics

Question:

During an isothermal expansion, a confined ideal gas does –150 J of work against its surrounding. This implies that :

Options:

150 J of heat has been added to the gas

150 J of heat has been removed from the gas

300 J of heat has been added to the gas

No heat is transferred because the process is isothermal

Correct Answer:

150 J of heat has been added to the gas

Explanation:

By first law of thermodynamics, ΔU = Q + W

For isothermal process, ΔU = 0

Thus, Q = – W ; W = – 150 Q = + 150

Thus, 150 J of heat is added to the gas.