Asked by tina

2NO(g) + O2(g) = 2NO2
If there are .02 moles of O2, .04 moles of NO, and .96 moles of 2NO2, calculate Kp if the total pressure is .2 atm.

Answers

Answered by drwls
The partial pressures are:
(0.02/1.02) * 0.2 = 0.00392 atm O2
(0.04/1.02) * 0.2 = 0.00784 atm NO
(0.96/1.02) * 0.2 = 0.1882 atm NO2

Now calculate the appropriate Kp value.

Kp = PCO2^2/[PNO^2*PO2]

This assumes that mixture is in chemical equlibrium. This is not always the case.
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