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Question: Answered & Verified by Expert
If $20 \mathrm{~cm}^3$ gas at $1 \mathrm{~atm}$. is expanded to $50 \mathrm{~cm}^3$ at constant $T$, then what is the final pressure
ChemistryStates of MatterJEE Main
Options:
  • A $20 \times \frac{1}{50}$
  • B $50 \times \frac{1}{20}$
  • C $1 \times \frac{1}{20} \times 50$
  • D None of these
Solution:
2425 Upvotes Verified Answer
The correct answer is: $20 \times \frac{1}{50}$
At constant $T, P_1 V_1=P_2 V_2$
$1 \times 20=P_2 \times 50 ; \quad P_2=\frac{20}{50} \times 1$

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