We are being asked to calculate the equilibrium constant, Kp for the given equilibrium reaction:
X2(g) ⇌ 2X(g)
When dealing with equilibrium and Kp:
•Kp→ equilibrium units are in terms of pressure
• Kp is an equilibrium expression:
▪ only gaseous species are included in the equilibrium expression
▪ the coefficient of each compound in the reaction equation will be the exponent of the concentrations in the equilibrium expression
PX2 = 1.75 atm
PX = 0 atm
In order to calculate the equilibrium concentrations of species, we need to use an ICE Chart.
Given values at equilibrium:
Ptotal = 2.75 atm
x = 1.00 atm
We can now calculate the equilibrium constant, Kp:
X2(g) ⇌ 2X(g)
The reaction X2(g) ⇌ 2X(g) occurs in a closed reaction vessel at constant volume and temperature. Initially, the vessel contains only X2 at a pressure of 1.75 atm. After the reaction reaches equilibrium, the total pressure is 2.75 atm.
What is the value of the equilibrium constant, Kp, for the reaction?
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the ICE Chart concept. You can view video lessons to learn ICE Chart. Or if you need more ICE Chart practice, you can also practice ICE Chart practice problems.
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