A sample of HI(g) is placed in a flask at a pressure of 0.2atm. At equilibrium the partial pressure of HI(g) is 0.04atm. What is Kp for the given equilibrium?
2HI(g)⇌H2(g)+I2(g)
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Solution
Change in the pressure of HI is 0.2−0.04=0.16 atm.
Equilibrium prtial pressure of hydrogen is 0.162=0.08atm.
Equilibrium partial pressure of iodine is 0.08 atm.