Answer :

For the given reaction, lets assume that p atm is the pressure exerted by ethene and hydrogen gas at equilibrium.

Therefore, the given reaction is:

C2H6 (g) C2H4 (g) + H2 (g)

Equilibrium pressure constant (Kp) is defined as a number that expresses the relationship between the partial pressures of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.

Here. Kp= 0.04 atm

For the given reaction,

Where, = partial pressure pf C2H4 in atom at equilibrium

= partial pressure of H2 in atom at equilibrium

= partial pressure of C2H6 in atom at equilibrium




(Taking positive value)


Therefore at equilibrium, [C2H6]= 4 - p = 4 - 0.38

=3.62 atom

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