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Question: Answered & Verified by Expert
If a gas expands at constant temperature, it indicates that
ChemistryThermodynamics (C)NEETNEET 2008 (Screening)
Options:
  • A kinetic energy of molecules decreases
  • B pressure of the gas increases
  • C kinetic energy of molecules remains the same
  • D number of the molecules of gas increases
Solution:
1598 Upvotes Verified Answer
The correct answer is: kinetic energy of molecules remains the same
Key Idea :
$\begin{gathered}
K E=\frac{3}{2} R T \\
\mathrm{KE} \propto \mathrm{T}
\end{gathered}$
Here, the temperature of gas remains constant, hence kinetic energy of molecules remains the same.

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