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Equilibrium Pressure in a System

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Hydrogen iodide can decompose into hydrogen and iodide gases. Kp for the reaction is 0.016. If 0.350 atm of Hl(g) is sealed in a flask, what would be the total pressure of the system when equilibrium is established?
a. 0.258atm
b. 0.279atm
c. 0.350atm
d. 0.385atm
e. 0.412atm

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We have
2HI ..... H2 + I2
Kp = 0.016
Kp = p H2/(p HI)2

Hence p H2 = Kp * ...

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