Homework Help: Chemistry

Posted by Jake on Thursday, May 3, 2012 at 11:53am.

Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200
oC in a closed
container, 1.1 atm of nitrogen gas is mixed with 2.1 atm of hydrogen gas in an otherwise empty container.
At equilibrium, the total pressure is 2.2 atm. Calculate the partial pressure of hydrogen gas at equilibrium.

Chemistry - DrBob222, Thursday, May 3, 2012 at 12:48pm
Is there a Kp? Kc?
Chemistry - Jake, Thursday, May 3, 2012 at 2:56pm
there isnt a kp or a kc
Chemistry - DrBob222, Thursday, May 3, 2012 at 5:36pm
Try this.
..........N2 + 3H2 ==> 2NH3
initial...1.1..2.1......0
change...-x....-3x......2x
equil...1.1-x..2.1-3x...2x
Ptotal = 2.2 = 1.1-x+2.1-3x+2x
Solve for x and substitute into 2.1-3x for pH2. Something like 0.6 atm. for pH2.
Chemistry - Jake, Thursday, May 3, 2012 at 10:01pm
Thanks it worked perfectly

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