The reaction quotient Q and equilibrium constant K for a chemical reaction are the same quantities __________.

A. at room temperature and 1 atm of pressure

B. in the presence of a catalyst

C. at standard temperature and pressure

D. when ÎS = 0

E. when the rate of the forward reaction equals the rate of the reverse reaction

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2 Jun 2021

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Related questions

1) If the temperature of an endothermic reaction at equilibriumcould be increased instantaneously, what would be the instantaneouseffect on Q and K before equilibrium was againachieved?

a.	Q would increase and K would stay thesame.
b.	Q would decrease and K would stay thesame.
c.	Q would stay the same and K wouldincrease.
d.	Q would stay the same and K woulddecrease.
e.	Both Q and K would stay the same.

2) Which of the following is true regarding the effect of acatalyst on chemical equilibrium?

a.	Only the forward rate increases so the quantity of productsincreases.
b.	Only the forward rate increases but the quantity of productsremains the same.
c.	Both the forward and reverse rates increase and the quantity ofproducts increases.
d.	Both the forward and reverse rates increase but the quantity ofproducts is unchanged.
e.	The effect varies depending on whether the reaction isendothermic or exothermic.

3) The equilibrium constant for a given reaction __________

a.	does not change with temperature.
b.	always increases with temperature.
c.	always decreases with temperature.
d.	increases with temperature for exothermic reactions only.
e.	increases with temperature for endothermic reactions only,

Fill in the blanks

1) Chemical equilibrium arises from the __________ of chemicalreactions and is defined when the __________ of the forwardreaction is equal to the __________ of the reverse reaction.

2) Students often write expressions for the equilibrium constantK_c and reaction quotient Q_cin exactly the same way. To avoid confusion, you must rememberthatK_c uses concentrations under __________conditions while Q_c uses concentrations under__________ conditions.

3) If Q for a reaction is greater than K, thereaction will be __________. If Q for a reaction is lessthan K, the reaction will be __________. If Q fora reaction is equal to K, the reaction will be__________.

4) How and why are the expressions for homogeneous equilibriumconstants different from the expressions for heterogeneousequilibrium constants?

1) If the temperature of an endothermic reaction at equilibriumcould be increased instantaneously, what would be the instantaneouseffect on Q and K before equilibrium was againachieved?

a.	Q would increase and K would stay thesame.
b.	Q would decrease and K would stay thesame.
c.	Q would stay the same and K wouldincrease.
d.	Q would stay the same and K woulddecrease.
e.	Both Q and K would stay the same.

2) Which of the following is true regarding the effect of acatalyst on chemical equilibrium?

a.	Only the forward rate increases so the quantity of productsincreases.
b.	Only the forward rate increases but the quantity of productsremains the same.
c.	Both the forward and reverse rates increase and the quantity ofproducts increases.
d.	Both the forward and reverse rates increase but the quantity ofproducts is unchanged.
e.	The effect varies depending on whether the reaction isendothermic or exothermic.

3) The equilibrium constant for a given reaction __________

a.	does not change with temperature.
b.	always increases with temperature.
c.	always decreases with temperature.
d.	increases with temperature for exothermic reactions only.
e.	increases with temperature for endothermic reactions only,

Fill in the blanks

1) Chemical equilibrium arises from the __________ of chemicalreactions and is defined when the __________ of the forwardreaction is equal to the __________ of the reverse reaction.

2) Students often write expressions for the equilibrium constantK_c and reaction quotient Q_cin exactly the same way. To avoid confusion, you must remember thatK_c uses concentrations under __________conditions while Q_c uses concentrations under__________ conditions.

3) If Q for areaction is greater than K, thereaction will be __________. If Q for areaction is less than K, thereaction will be __________. If Q for areaction is equal to K, thereaction will be __________.