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Standard XIII

Chemistry

Dalton's Law of Partial Pressures

N2 is found i...

Question

$N_{2}$ is found in a litre flask under 100kPa pressure and $O_{2}$ is found in another 3 litre flask under 320 kPa pressure. If the two flasks are connected, the resultant pressures is

310 kPa

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210 kPa

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420 kPa

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365 kPa

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265 kPa

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Solution

The correct option is E
265 kPa

The key idea is that total number of moles are the same initially and finally. Also, the temperature remains constant.
Hence, PV = constant.
Total volume = 4 litres.
Total pressure = $\frac{R T}{V} = \frac{(100 + 960)}{4} = 265 k P a$

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N2 is found in a litre flask under 100kPa pressure and O2 is found in another 3 litre flask under 320 kPa pressure. If the two flasks are connected, the resultant pressures is

The correct option is E 265 kPa The key idea is that total number of moles are the same initially and finally. Also, the temperature remains constant. Hence, PV = constant. Total volume = 4 litres. Total pressure = RTV=(100+960)4=265 kPa

$N_{2}$ is found in a litre flask under 100kPa pressure and $O_{2}$ is found in another 3 litre flask under 320 kPa pressure. If the two flasks are connected, the resultant pressures is

The correct option is E
265 kPa

The key idea is that total number of moles are the same initially and finally. Also, the temperature remains constant.
Hence, PV = constant.
Total volume = 4 litres.
Total pressure = $\frac{R T}{V} = \frac{(100 + 960)}{4} = 265 k P a$