5.61a

Gabriella Bates 2L
Posts: 113
Joined: Thu Jul 11, 2019 12:15 am

5.61a

5.61 The overall photosynthesis reaction is 6 CO2(g) + 6 H2O(l) -- C6H12O6(aq) + 6 O2(g), and H = 12802 kJ. Suppose that the reaction is at equilibrium. State the effect that each of the following changes will have on the equilibrium composition: tends to shift toward the formation of reactants, tends to shift toward the formation of products, or has no effect. (a) The partial pressure of O2 is increased.

The solutions manual states that because more O2 is added, the reaction will shift towards products. Does increasing the partial pressure of O2 mean that they are adding more O2 gas particles? I initially thought there would be no change since the moles of gaseous particles are equal on both sides.

Shutong Hou_1F
Posts: 117
Joined: Sat Sep 14, 2019 12:17 am

Re: 5.61a

I believe that increasing the partial pressure of O2 is achieved by means of adding more O2 gas particles. And remember that P (partial pressure) = concentration * R * T (temperature).

JChen_2I
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

Re: 5.61a

Shutong Hou_1F wrote:I believe that increasing the partial pressure of O2 is achieved by means of adding more O2 gas particles. And remember that P (partial pressure) = concentration * R * T (temperature).

Doesn't increasing the partial pressure have the same effect as increasing the concentration? Why doesn't the equilibrium shift to the left?

JChen_2I
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

Re: 5.61a

Gabriella Bates 2L wrote:5.61 The overall photosynthesis reaction is 6 CO2(g) + 6 H2O(l) -- C6H12O6(aq) + 6 O2(g), and H = 12802 kJ. Suppose that the reaction is at equilibrium. State the effect that each of the following changes will have on the equilibrium composition: tends to shift toward the formation of reactants, tends to shift toward the formation of products, or has no effect. (a) The partial pressure of O2 is increased.

The solutions manual states that because more O2 is added, the reaction will shift towards products. Does increasing the partial pressure of O2 mean that they are adding more O2 gas particles? I initially thought there would be no change since the moles of gaseous particles are equal on both sides.

Hi! I checked the answer key and it says that equilibrium shifts towards the reactants side of the equation. This makes more sense because increasing partial pressure has the same effect as increasing the concentration. If there is an increase in products, the reaction will use it up by creating more reactants, hence why the reaction shifts to the left.

Return to “Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions”

Who is online

Users browsing this forum: No registered users and 1 guest