Question

In: Chemistry

For a particular reaction at equilibrium, the pressure of the bromine is 2.0 atm at 25°C.

For a particular reaction at equilibrium, the pressure of the bromine is 2.0 atm at 25°C. The total pressure in the vessel at equilibrium is 10.0 atm. The balanced chemical equation is:

2NOBr (g) <-- --> 2NO (g) + Br₂ (g)

What is the value of Kp for the reaction?

Expert Solution

2 NOBr (g) <-------------> 2 NO (g) + Br2 (g)

y 0 0

y - 2x 2x x

At equilibrium :

pressure of Br2 = x = 2.0 atm

total pressure = 10.0 atm

y - 2x + 2x + x = 10

y + x = 10

y + 2 = 10

y = 8

pressure of NOBr = y - 2x = 8 - 4 = 4 atm

pressure of NO = 2x = 4 atm

Kp = P²NO x Pbr2 / P²NOBr

= 4^2 x 2 / 4^2

= 2

Kp = 2.0

queen_honey_blossom answered 2 years ago

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