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A mixture of H2,N2 and NH3 with molar co...

A mixture of `H_2,N_2` and `NH_3` with molar concentrations `5.0xx10^(-3) mol L^(-1) , 4.0xx10^(-3) mol L^(-1)` and `2.0xx10^(-3) mol L^(-1)` respectively was prepared and heated to 500 K. The value of `K_c` for the reaction: `3H_2(g)+N_2(g) hArr 2NH_3(g)` at this temperature is 60.
Predict whether ammonia tends to form or to decompose at this stage of concentration.

Text Solution

Verified by Experts

Reaction quotient, `Q_c` for the reaction,
`N_2(g) +3H_2(g) hArr 2NH_3(g)`
`Q_c=([NH_3]^2)/([N_2][H_2]^3)`
`[NH_3]=2.0xx10^(-3) mol L^(-1) , [H_2]=5.0xx10^(-3) mol L^(-1)`
`[N_2]=4.0xx10^(-3) mol^(-1)`
`Q_c=(2.0xx10^(-3))^2/((4.0xx10^(-3))(5.0xx10^(-3))^(3))=8.0xx10^3 L^2 mol^(-2)`
`K_c=60`
Since `Q_c > K_c `, reaction will go in the left direction and ammonia will decompose.
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