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The volume of 0.354g of helium at 273°C and 114cmhg of mercury pressure is 2667cm\(^3\)....

Physics
JAMB 2019

The volume of 0.354g of helium at 273°C and 114cmhg of mercury pressure is 2667cm\(^3\). Calculate the volume at STP.

  • A. 2000.25 cm\(^3\)
  • B. 200.025 cm\(^3\)
  • C. 4003.27 cm\(^3\)
  • D. 2010.25 cm\(^3\)
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Correct Answer: Option A
Explanation

m = 0.354g, T\(_1\) = 273°C = 273 + 273 = 546K
P\(_1\) = 114cmHg, V\(_1\) = 2667cm\(^3\) at STP
T\(^2\) = 273K, P\(_2\) = 76cmHg, V\(_2\) = ?

 \(\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_1}\)

= 2000.25cm\(^3\)

There is an explanation video available below.


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Explanation Video

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