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(a) A mixture of 1.57 mol of N(2) 1....

(a) A mixture of 1.57 mol of `N_(2) ` 1.92 mol of `H_(2) ` and 8.13 of `NH_(3)` is introduced into a 20 L reaction vessel at 500 K. At this temperature the equilibrium constant `K_(c)` for the reaction
`N_(2) (g) + 3 H_(2) (g) hArr 2NH_(3) (g) " is " 1.7 xx 10^(2)`
Is the reaction mixture of equilibrium ? If not What is the direction of the net reaction ?
(b) In the reaction `N_(2) + 3 H_(2) hArr 2 NH_(3)` at equilibrium helium gas is injected into the vessel without disturbing the overall pressue of the system. What will be the effect on the equilibrium ?

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