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22/09/2021 11:35 am
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Choose the correct option for the total pressure (in atm.) in a mixture of 4 g O2 and 2 g H2 confined in a total volume of one litre at 0°C is
[Given R = 0.082 L atm mol]–1K–1, T = 273K]
(1) 2.518
(2) 2.602
(3) 25.18
(4) 26.02
1 Answer
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22/09/2021 11:41 am
Correct answer: (3) 25.18
Explanation:
nO2 = \(\frac{4}{32}\) = \(\frac{1}{8}\) mol
nH2 = \(\frac{2}{2}\) = 1 mol
nTotal = nO2 + nH2 = \(\frac{1}{8}\) + 1
= \(\frac{9}{8}\) mol
PV = nRT
PTotal x 1 = \(\frac{9}{8}\) x 0.082 x 273
PTotal = 25.18 atm