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The Volume Of 0.354g Of Helium At 273°C And 114cm Of Mercury Pressure Is 2667cm3. Calculate The Volume? - Erudites Academy

The volume of 0.354g of helium at 273°C and 114cm of mercury pressure is 2667cm3. Calculate the volume?

by | Jan 4 | Physics WAEC | 0 comments

A. 2000.25 cm³
B. 200.025 cm³
C. 4003.27 cm³
D. 2010.25 cm³

Correct Answer: Option B

Explanation

m = 0.354g, T1 = 273°C = 273 + 273 = 576K
P1 = 114cmHg, V1 = 2667cm³ at STP
T2 = 273K, P2 = 76cmHg, V2 = ?

P1V1/T1 = P2V2/T2

V2 = (114 × 2667 × 273) / (76 × 576) = 2000.25cm³

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