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The equilibrium constant Kc for the reaction is 4.2 at 1650 degrees Celsius. Initially 0.73 mol...

The equilibrium constant Kc for the reaction is 4.2 at 1650 degrees Celsius. Initially 0.73 mol H2 and 0.73 mol CO2 are injected into 5.5L flask. Calculate the concentration of each species at equilibrium
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Answer #1

concentration of H2 = 0.73 / 5.5 = 0.1327 M

concentration of CO2 = 0.73 / 5.5 = 0.1327 M

H2      + CO2   ---------------> CO + H2O

0.133 0.133                           0         0

0.133 - x   0.133 - x                      x           x

Kc = [CO][H2O] / [CO2][H2]

4.2 = x^2 / (0.133 - x)^2

2.05 = x / 0.133 - x

x = 0.0892

concentration of each species at equilibrium :

[CO] = 0.0892 M

[H2O] = 0.0892 M

[CO2] = 0.0435 M

[H2] = 0.0435 M

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