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Ideal Gas Equation

An enclosure ...

Question

An enclosure of volume 3 litre contains 16g of oxygen, 7g of nitrogen and 11g of carbondioxide at 27 $^{o}$ C. The pressure exerted by the mixture is approximately

9 atmosphere

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8.3 atmosphere

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3 atmosphere

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1 atmosphere

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Solution

The correct option is B 8.3 atmosphere
Total number of moles = number of moles of oxygen + number of moles of nitrogen + number of moles of carbon-di-oxide
$\frac{16}{32} + \frac{7}{14} + \frac{11}{44} = 1 m o l e$
Molecular weight of Carbon-di-oxide = 44g
Molecular weight of Oxygen =32g
Molecular weight of nitrogen=14g
Using ideal gas equation,
$P = \frac{n R T}{V} = \frac{1 \times 8.3 \times 300}{(3 \times 10^{- 3})} = 8.3 a t m (n e a r l y)$
Hence, Option B is correct.

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An enclosure of volume 3 litre contains 16g of oxygen, 7g of nitrogen and 11g of carbondioxide at 27oC. The pressure exerted by the mixture is approximately

An enclosure of volume 3 litre contains 16g of oxygen, 7g of nitrogen and 11g of carbondioxide at 27 $^{o}$ C. The pressure exerted by the mixture is approximately