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.

A mixture of H_2,N_2 and NH_3 with molar concentrations 5.0xx10^(-3) m

1.	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.
Answer» SOLUTION :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.