Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET 202623 AprilEvening Shift
Exam
MHT CET
Year
2026
Date
23 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Thermodynamics (C)

MHT CET 2026 · 23 April · Evening Shift · Chemistry · Thermodynamics (C)

What is the work done when an ideal gas (0.300 mol) expands in...

What is the work done when an ideal gas (0.300 mol) expands in vacuum?

Options

  1. Azero
  2. Bone
  3. Ctwo
  4. Dthree

Correct answer

A. zero

Step-by-step solution

Work done during the expansion of a gas is given by the expression W=−PextΔVW = -P_{ext} \Delta V.

For expansion in a vacuum (free expansion), the external pressure PextP_{ext} is zero.

Substituting Pext=0P_{ext} = 0 in the expression for work done, we get W=0W = 0.

Thus, the work done when an ideal gas expands in a vacuum is zero.

Answer: zero
Practice Thermodynamics (C) on Quantrex Academy →

More from Thermodynamics (C)

A certain organic solvent has Δ H\_vap = 28.50\ kJ mol^ -1 and Δ S\_vap = 88.2\ J K^ -1 \… MHT CET Medical 2026Which of the following statements regarding spontaneous process is NOT true? MHT CET Medical 2026Calculate Δ H for a reaction, 2X_ (g) + Y_ (g) arrow 2Z_ (g) at 298 K if Δ U = -10.5 kJ… MHT CET Medical 2026500\ mL of nitrogen gas and 750\ mL hydrogen gas were allowed to react at 1\ bar pressure… MHT CET Medical 2026The relationship between Δ H and Δ U for the reaction, PCl_3(g) + Cl_2(g) arrow PCl_5(g)… MHT CET Medical 2026What would be the heat released in kJ when 450\ cm^3 of 0.02\ M\ H_2SO_4 is mixed with… MHT CET Medical 2026Identify from following reactions that it takes place with Δ H = Δ U . MHT CET Medical 2026Calculate the work done in the following reaction at 300\ K , A(g) + B(g) = 2C(g) [R =… MHT CET Medical 2026 Full Thermodynamics (C) list All MHT CET Medical PYQs