What affects Kp?
I thought only temperature affects Kp. But this question says pressure can too. What's correct?
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
I thought only temperature can affect Kp. But this question says pressure can affect it.
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Maybe have a look at this to see if this’ll help?
https://www.chemguide.co.uk/physical/equilibria/change.html
you do have to scroll just a bit but I hope it helps whilst you’re waiting for other answers
https://www.chemguide.co.uk/physical/equilibria/change.html
you do have to scroll just a bit but I hope it helps whilst you’re waiting for other answers
Original post by zehra895642
I thought only temperature affects Kp. But this question says pressure can too. What's correct?
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Pressure does not affect kp.
Pressure disturbs the ratio in the kp expression, so that it is NOT equal to kp.
The system then responds by moving in such a way as to restore the value of the equilibrium expression ratio (the quotient), so that it is once again equal to kp.
2A(g) <==> B(g)
If the partial pressure is represented by brackets.
Quotient at equilibrium = (B)/(A)2 = kp
If the volume is halved the partial pressure of both A and B will double. Quotient is now much smaller than kp
The system responds by moving to the right hand side to reduce the amount of A and increase the amount of B until the quotient equals kp once again.
Original post by zehra895642
I thought only temperature can affect Kp. But this question says pressure can affect it.
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Q. The chemist increases the pressure of the equilibrium mixture at the same temperature.
State, and explain in terms of Kp, how you would expect the equilibrium position to
change
A. Equilibrium shift
(Equilibrium position) shifts to right / forward /
towards products
Effect of increased pressure on Kp expression
Ratio (in Kp expression) decreases
OR
Denominator/bottom of Kp expression increases
more (than numerator/top)
Equilibrium shift (Kp expression)
Ratio (in Kp expression) increases to restore Kp
OR
Numerator/top of Kp expression increases to
restore Kp
Please don't make double posts on the same question.
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