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General : Calculating Kp values
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 Message 1 of 3 in Discussion 
From: MSN NicknameN_2006  (Original Message)Sent: 3/8/2008 2:09 AM

Consider the following reaction at 100 °C:

CH4(g) + 2H2S(g) �?CS2(g) + 4H2(g)

The equilibrium concentration of the

reactants and products are:

CS2 = 6.10 × 10�? M; H2 = 1.17 × 10�? M;

CH4 = 2.35 × 10�? M; H2S = 2.93 × 10�? M.

Calculate the value of Kp for this reaction.



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 Message 2 of 3 in Discussion 
From: MSN Nickname·Steve·Sent: 3/8/2008 2:27 AM
An easy method of obtaining KP is to first calculate KC by plugging the given equilibrium molarities into the equilibrium constant expression.  Then convert KC to KP using the formula

KP  =  KC[RT]Δn
 
 
Steve

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 Message 3 of 3 in Discussion 
From: MSN NicknameN_2006Sent: 3/8/2008 2:29 AM
Oh right... thanks Steve!