Write the equilibrium expression for each of the following reactions:
N2 (g) + 3 H2 (g) ↔ 2 NH3 (g) + heat
Please guide me and help!
Here is the LONG version of the definition. How you do it will follow.
When a system is in equilibrium, the product of the products of the reaction, divided by the product of the reactants, each raised to a power indicated by the coefficients in the balanced chemical equation, is a constant.
Here is what you do. Keq = (products)^x/(reactants)^y so
2A + B ==> 3C + D
Keq = (C)^3(D)/(A)^2(B)
(A) is read "concentration of A" and is in mols/L. Similarly for B, C, D.
Let me know if this is not clear. You write the Keq for the reaction and I'll check it for you.
Sure! To write the equilibrium expression for a reaction, you need to follow a few steps. Here's how you can do it for the given reaction:
Step 1: Write the balanced equation for the reaction.
The balanced equation for the given reaction is:
N2 (g) + 3 H2 (g) ↔ 2 NH3 (g) + heat
Step 2: Write the expression for the concentration of each species.
For the reaction given, the species involved are N2, H2, and NH3. The concentration expression for each species is given by:
[N2], [H2], and [NH3], respectively.
Step 3: Identify the stoichiometric coefficients.
In this reaction, the stoichiometric coefficients of N2, H2, and NH3 are 1, 3, and 2, respectively.
Step 4: Write the equilibrium expression.
The equilibrium expression is given by the product of the concentrations of the products raised to the power of their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to the power of their stoichiometric coefficients. Since there is no heat term in the equilibrium expression, we can ignore it for now. Therefore, the equilibrium expression for the given reaction is:
Kc = ([NH3]^2) / ([N2] * [H2]^3)
Note: The equilibrium constant (Kc) represents the ratio of the concentration of the products to the concentration of the reactants at equilibrium.
That's it! You have successfully written the equilibrium expression for the given reaction.