We’re being asked to determine the equilibrium concentration of H2 at 700 K for the following reaction:
H2(g) + I2(g) ⇌ 2 HI(g)
Recall that the equilibrium constant is the ratio of the products and reactants.
We use Kp when dealing with pressure and Kc when dealing with concentration:
Note that solid and liquid compounds are ignored in the equilibrium expression.
At 700 K, the reaction below has a Kp value of 54. An equilibrium mixture at this
temperature was found to contain 1.84 atm of I2 and 4.24 atm of HI. Calculate the equilibrium pressure of H2.
H2(g) + I2(g) <=> 2 HI(g). Enter answer to 2 decimal places
A. 0.18 atm
B. 0.04 atm
C. 5.53 atm
D. 0.30 atm
E. 0.81 atm
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