State the name of the term for the transfer of thermal energy during a reaction.
State what happens, if anything, to the forward reaction rate when the concentration of $\text{CCl}_4$ is increased. Explain your answer with collision theory.
State what happens to the equilibrium position, if anything, when pressure is increased. Explain your answer.
On Fig. 5.1: • add the formulae of the reactants and products • include an arrow, labelled $E_a$, to indicate the activation energy • include an arrow, labelled $\Delta H$, to show the transfer of energy in the reaction.
Define the term activation energy.
State one way in which the activation energy of a reaction can be changed.
Use the bond energies in Table 5.1 together with the $\Delta H$ value for the reaction to work out the H-Cl bond energy by following these steps: • Work out the energy needed to break the bonds in the reactants. • Work out the energy released when the bonds in carbon dioxide are formed. • Work out the H-Cl bond energy.