Problem: At 327ºC, the equilibrium concentrations are [CH 3OH] = 0.15 M, [CO] = 0.24 M, and [H2] = 1.1 M for the reactionCH3OH(g) ⇌ CO(g) + 2H2(g)Calculate Kp at this temperature.

FREE Expert Solution

We are being asked to calculate Kp  at 327°C for the reaction:

CH3OH(g) ⇌ CO(g) + 2H2(g)


When dealing with equilibrium:

Kc → equilibrium units are in molarity 
Kp → equilibrium units in terms of pressure


Kp and Kc are related to one another by the following equation below: 

Kp=KcRTn

R = gas constant = 0.08206 (Latm)/(molK)
T = temperature, K
Δn = moles of gas products – moles of gas reactants


Step 1. Calculate Kc:

Kc=[products][reactants]Kc=[CO]H22[CH3OH]Kc=(0.24 )(1.1)20.15Kc=1.936


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Problem Details

At 327ºC, the equilibrium concentrations are [CH 3OH] = 0.15 M, [CO] = 0.24 M, and [H2] = 1.1 M for the reaction

CH3OH(g) ⇌ CO(g) + 2H2(g)

Calculate Kp at this temperature.

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Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.