Homework Help: chemistry

Posted by Ashley Jimenez on Monday, February 18, 2013 at 11:19pm.

At 25°C, Kp = 2.910−3 for the following reaction.
NH4OCONH2(s) 2 NH3(g) + CO2(g)
In an experiment carried out at 25°C, a certain amount of NH4OCONH2 is placed in an evacuated rigid container and allowed to come to equilibrium. Calculate the total pressure in the container at equilibrium.

chemistry - DrBob222, Tuesday, February 19, 2013 at 12:16am
I can't tell what the value of Kp is. I will assume you meant it to be 2.91E-3. BTW, you need to learn where the arrow key is too. The arrow tells us where the reactants stop and the products begin.

......NH4OCONH2(s) ==> 2NH3 + CO2
I.......solid...........0.......0
C.......solid...........2x.......x
E.......solid...........2x......x

Kp = p^2NH3*pCO2
Kp = (2x)^2(x)

Solve for x, 2x, and add the two pressures to find the total pressure.

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