Equilibrium and Reversible Reactions

What is the correct symbol for a reversible reaction?

• ➔

• ⇌

• =

A reversible reaction is one in which both the forward and reverse reactions can take place.

• A reversible reaction is one in which both the forward and reverse reactions can take place.

• A reversible reaction is one in which only the forward reaction can take place.

• A reversible reaction is one in which only the reverse reaction can take place.

• A reversible reaction is one in which no reaction takes place.

Which of the following statements about a system in equilibrium are true?

select all that apply

• It requires a closed system

• The concentrations of the reactants and products are equal to each other

• The forward and backward reactions occur at the same rate

• The concentrations of the reactants and products remain constant

To reach equilibrium, the reactants and products must be in a ______ system. This means that the reactants and products can't escape.

At equilibrium, if the concentration of reactants is higher than the concentration of products, we say that the position of equilibrium lies to the:

• Left

• Right

• Center

• Top

What happens in an endothermic reaction?

• Heat energy is taken in from the surroundings

• Heat energy is given out to the surroundings

In a reversible reaction, if the forward reaction is exothermic, the backward reaction is _______.

• endothermic

• exothermic

• neutral

• catalytic

If the position of equilibrium lies to the right, it means there are more:

• Products

• Reactants

In a reversible reaction, if the forward reaction is endothermic, what would be the effect of increasing the temperature?

• Equilibrium would shift to the right

• Equilibrium would shift to the left

• Equilibrium would not shift

In a reversible reaction, if the forward reaction is exothermic, what would be the effect of decreasing the temperature?

• Yield of products would increase

• No change in the yield of products

• Yield of products would decrease