Question

write the pressure equilibrium constant expression for this reaction. 2li₃n(s)→6li(s)+n₂(g)

Explanation:

Step1: Recall the formula for pressure equilibrium constant

For a reaction \(aA + bB
ightleftharpoons cC + dD\), \(K_p=\frac{P_C^c\times P_D^d}{P_A^a\times P_B^b}\), where \(P\) represents partial pressure and \(a,b,c,d\) are stoichiometric coefficients. Solids (\(s\)) are excluded from the \(K_p\) expression as their activity is \(1\).

Step2: Apply the formula to the given reaction

In the reaction \(2Li_3N(s)\to6Li(s)+N_2(g)\), \(Li_3N\) and \(Li\) are solids. So, only \(N_2\) (a gas) is included. The stoichiometric coefficient of \(N_2\) is \(1\).

Answer:

\(K_p = P_{N_2}\)