Chemical Equilibrium v.2.0

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward and reverse reaction rates are equal and concentration is constant

• Forward reaction rate is faster than the reverse and concentrations are equal

• Forward reaction rate is faster than the reverse and concentration is equal

• Forward and revers reaction rates are equal and concentration is equal

When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in

(a)  

Which of the following is NOT true at equilibrium?

• The concentration of the reactants is equal to the concentration of the products.

• The forward and reverse reactions proceed at the same rate.

• The concentrations of reactants and products do not change.

• The forward and reverse reactions continue to occur.

Which of the following is the condition needed to establish the equilibrium?

• Constant Temperature

• All reactants and products should be in closed system

• Products and reactants should be in constant dynamic motion

If the equilibrium constant is less than 1, it means that

• Reactants are favored

• Products are favored

How do catalysts increase the rate of reaction?

• the activation energy is lowered

• The frequency of collisions is the increased

• the energy of collisions is increased

• Both the frequency and energy of collisions is increased

For the reaction...

heat + N₂ + O₂ <−> 2NO

If NO is removed from the system, the concentration of N₂ will (a)   . (Increase or Decrease)

This symbol indicates that a reaction is (a)  

What is the K_eq expression for this reaction?

2 NO_(g) + O_2(g) ⇌ 2 NO_2(g)

• K_eq = [NO]² [O₂] [NO₂]²

• K_eq = [NO₂]² / [NO]² [O₂]

• K_eq = [NO]² [O₂] / [NO₂]²

• K_eq = [NO₂]² / [NO]² + [O₂]

For the reaction...

H_{2 (g)} + Cl_{2 (g)} <−> 2HCl _(g) + heat

If the temperature is cooled, the _________ reaction will be favored.

• forward

• reverse

• forward and reverse