Consider the following reaction at equilibrium ... - SS3 Chemistry Chemical Thermodynamics Question
Consider the following reaction at equilibrium: N2(g) + 3H2(g) ⇌ 2NH3(g)
At a certain temperature, the concentrations of N2, H2, and NH3 are 0.10 M, 0.20 M, and 0.30 M, respectively. Calculate the value of the reaction quotient (Q) for this system.
The reaction quotient (Q) is calculated using the same formula as the equilibrium constant (K), but instead of using standard Gibbs free energy change (ΔG°), we use the concentrations of the reactants and products at a given moment. The formula is:
Q = [NH3]2 / ([N2] × [H2]3)
where [N2], [H2], and [NH3] are the concentrations of N2, H2, and NH3, respectively.
Given [N2] = 0.10 M, [H2] = 0.20 M, and [NH3] = 0.30 M, we can calculate the value of Q:
Q = (0.30 M)2 / (0.10 M × (0.20 M)3)
Q = 0.09 M2 / (0.10 M × 0.008 M3)
Q = 0.09 M2 / (0.0008 M4)
Q ≈ 112.5 M(-2)
Therefore, the value of the reaction quotient (Q) for this system is approximately 112.5 M(-2).
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