Homework Help: Chemistry

Posted by Kim on Monday, March 2, 2009 at 11:52pm.

How do you solve this:

Consider the decomposition of ammonium chloride at a cerain temperature

NH4Cl(s) <- NH3(g) + HCl(g)
->

Calculate the equilibrium constant Kp if the total pressure is 2.2 atm at that temperature.

Chemistry - DrBob222, Tuesday, March 3, 2009 at 12:01am
I think I would do the following:
NH4Cl(s) ==> NH3(g) + HCl(g)

Ptotal = PNH3 + PHCl
2.2 atm = PNH3 + PHCl
From the equation, PNH3 = PHCl; therefore,
2.2 = 2PNH3 and you can go from there.
Then substitute partial pressures into
Kp = PNH3*PHCl to find Kp.
Chemistry - Kim, Tuesday, March 3, 2009 at 12:29am
thank you. so what did you get as a final answer for this problem then? and what did u do after doing 2.2=2PHN3

and after subsituting the partial pressure??

Thanks
Chemistry - DrBob222, Tuesday, March 3, 2009 at 12:38am
The remainder of the problem is up to you. We try to HELP you do the work but we don't do it. You can substitute and calculate Kp; it's just multiplying two numbers together.
Chemistry - Anonymous, Tuesday, July 17, 2012 at 4:05pm
1.2

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