Stogs GCSE Interleaving Equilibria L

A reversible reaction always takes in more energy in one direction than it gives out in the opposite direction.

• True

• False

Which of these uses an endothermic reaction?

• Hand warmers

• Sports injury packs

• Self heating cans for drinks

Which of these isn’t a raw material used in the Hager process?

• Hydrogen

• Nitrogen

• Oxygen

Increasing the temperature of a reversible reaction will increase the yield of the exothermic reaction.

• True

• False

The equation shows a reversible reaction, where A to D are different gases. Which direction would be favoured if the pressure were increased?

• Forwards as more gas moles in products.

• Backwards as more gas moles in products.

• Forwards as more gas moles in reactants.

• Backwards as more gas moles in reactants.

Nitrogen for use in the Haber process is obtained from air.

• True

• False

How is ammonium removed during the Haber process?

• By adding gases that react with the hydrogen and nitrogen.

• By fractional distillation.

• By cooling to liquefy it.

What does the symbol in the image mean?

• A reaction is indecisive

• A reaction is reversible

• There is a higher concentration of reactants than products.

• There is a higher concentration of products than reactants.

Which of the following statements about equilibrium is true?

• At equilibrium, all the reactants have reacted to form products.

• At equilibrium, the amount of products equal the amount of reactants.

• At equilibrium, the rate of the forward reaction is equal to the rate of the backwards reaction.

• At equilibrium both the forwards and the backwards reactions stop.

In a reversible reaction the forward reaction is endothermic. What can you say about the enthalpy change for the reverse reaction?

• It is also endothermic.

• It is exothermic.

• It’s energy transfer is greater.

• It’s energy transfer is the same.

• It’s energy transfer is less.