Q.
A mixture N2 and H2 gases were taken in 1 : 5 mole ratio in a closed container at 103 atm and 700K. After attaining equilibrium the resulting mixture contain 0.2 mole fraction of NH3 gas. Equilibrium constant KP for the reaction is ____?
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a
2.6×103 atm -2
b
5×10-3 atm -2
c
2.6×10-4 atm-2
d
1.1×10-6 atm-2
answer is D.
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Detailed Solution
N2(g)+3H2(g)⇌2NH3(s) Initial mole 1 5 0 At equilibrium 1-x 5-3x 2x mole fractionof NH3 at equilibrium =2x6-2x 2x6-2x=0.2 x=0.5 Partial pressure of N2 gas =1-x6-2x×103 atm =102 atm Partial pressure of H2 gas =5-3x6-2x×103 atm =7×102 atm Partial pressure of NH3 gas =2x6-2x×103 atm =2×102 atm KP=PNH32PN2PH23 =1.1×10-6 atm-2
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