Question

Assertion :When a gas at high pressure expands against vacuum, the work done is maximum. Reason: Work done in expansion depends upon the pressure inside the gas and increase in volume.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is D Both Assertion and Reason are incorrect

$\text{Option D is correct.}$

$\text{In a vacuum there is nothing that the gas can do work on.}$$\text{Also there is nothing that the gas has to overcome its pressure to expand. The work done will be zore.}$

$\text{We sum the work done during a large nmber of small changes of the volume.}$$\text{The woek depends on how exactly the presure varies during the expansion process.}$