Multiple choice

What is the pressure required to compress 200 ml of a gas at constant temperature to a volume of 28 ml, if the initial pressure is 30 cm. Hg?

  1. 214 cm Hg

  2. 224 cm Hg

  3. 234 cm Hg

  4. 200 cm Hg

  5. 228 cm Hg
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Initial pressure, P1 = 30 cm
Initial volume V1 = 200 ml Final volume V2 = 28 ml Final pressure P2 = ? Then, P1 V1 = P2 V2 at constant temperature ∴ 30 x 200 = P2 x 28 ∴ P2 = (30 x 200)/28 = 214 cm Hg

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