First slide

Gaseous state

Question

A 1.00 L vessel containing 1.00 g H₂ gas at 27^oc is connected to a 2.00 L vessel containing 88.0 g CO₂ gas, at also 27°c. When the gases are completely mixed, total pressure is

Easy

A

20.525 atm
B

4.105 atm
C

16.420 atm
D

730.69 atm

Solution

$p = \frac{n_{1} + n_{2}}{V_{1} + V_{2}} RT = \frac{0 .5 + 2}{1 + 2} \times 0 .0821 \times 300$
$[n_{1} (H_{2}) = \frac{1}{2} mol and n_{2} ({CO}_{2}) = 2 mol]$
$p = 20 .525 atm$

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