Question

H2 + I2 <---> 2HI Kp=100 Initially, a flask contains hydrogen gas at 0.010atm iodine gas...

H2 + I2 <---> 2HI

Kp=100

Initially, a flask contains hydrogen gas at 0.010atm iodine gas at 0.0050atm, and hydorgen iodide gas at 0.50atm.
Determine equilibrium partial pressure of each gas in the flask.
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Answer #1

H2    +      I2    <---------->   2 HI

0.01       0.005                0.50

0.01-x 0.005 -x             0.50 + 2x

Kp = P2HI / PH2 x PI2

100 = (0.50 - 2x)^2 / (0.01-x)(0.005-x)

x = - 0.03548

equilibrium partial pressures ;

PH2 = 0.0455 atm

PI2 = 0.0405 atm

PHI = 0.184 atm

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