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Question

For the gaseous reaction 3H2+N22NH3, the equilibrium pressures of H2 and N2 are 0.4 atm and 0.8 atm respectively. The total pressure of the equilibrium system is 2.8 atm. The value of Kp is:

A
50
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B
5.0
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C
5.0×102
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D
5.0×102
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Solution

The correct option is A 50
Given equilibrium reaction, 3H2+N22NH3 t=eqil. 0.4am0.8alm

Total pressure at equilibrium =2.8 atm.
Thus, pressure of NH3=[28(0.4+0.8)] atm =1.6 atm.
Wow, value of kip for an equilibrium =[PC]ν[PA]α[PB]β, for equilibrium, αA(x)+βB(g)C(ϑ) Hex, kp=(1.6)2(0.4)3(0.8)1(a+m)2=50(a+m)2

so, option (A) is correct.

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