# Problem: Consider the following reaction: 2CH4(g) ⇌ C2H2(g) + 3H2(g)The reaction of CH4 is carried out at some temperature with an initial concentration of [CH4] = 0.089 M. At equilibrium, the concentration of H2 is 0.016 M. Find the equilibrium constant at this temperature.

###### FREE Expert Solution

We are being asked to calculate Kc for the given reaction:

2CH4(g) C2H2(g) + 3H2(g)

When dealing with equilibrium and Kc:

Kc → equilibrium units in terms of concentration (i.e. molarity)
Kc is an equilibrium expression:

$\overline{){{\mathbf{K}}}_{{\mathbf{c}}}{\mathbf{=}}\frac{\mathbf{products}}{\mathbf{reactants}}}$

solid species are not included in the equilibrium expression
▪ the coefficient of each compound in the reaction equation will be the exponent of the concentrations in the equilibrium expression

100% (119 ratings) ###### Problem Details

Consider the following reaction: 2CH4(g) ⇌ C2H2(g) + 3H2(g)

The reaction of CH4 is carried out at some temperature with an initial concentration of [CH4] = 0.089 M. At equilibrium, the concentration of H2 is 0.016 M. Find the equilibrium constant at this temperature.