Explain what the term bond energy means.
Describe and explain the pattern in the bond energies of the C-X bond in halogenoalkanes, where $X = \text{F}$, $\text{Cl}$, $\text{Br}$ or $\text{I}$.
Describe the link between the reactivity of halogenoalkanes, RX, and the bond energies of the C-X bond.
Use the Data Booklet to suggest why CFCs such as $\text{CF}_2\text{Cl}_2$ are far more damaging to the ozone layer than fluorocarbons such as $\text{CF}_4$ or hydrocarbons such as butane, $\text{C}_4\text{H}_{10}$.
Predict the products of the reactions shown, then draw their structures. The molecular formula for each product is provided.
State the conditions required for the reaction $\text{C}_2\text{H}_6 + \text{Cl}_2 \rightarrow \text{C}_2\text{H}_5\text{Cl} + \text{HCl}$.
State the reaction type taking place here.
Use the Data Booklet to calculate the enthalpy change, $\Delta H$, for the step $\text{Cl}^\bullet + \text{CH}_3\text{CH}_3 \rightarrow \text{HCl} + \text{CH}_3\text{CH}_2^\bullet$.
Use the Data Booklet to calculate the enthalpy change, $\Delta H$, for the analogous reaction $\text{I}^\bullet + \text{CH}_3\text{CH}_3 \rightarrow \text{HI} + \text{CH}_3\text{CH}_2^\bullet$.
Hence suggest why iodoethane cannot be made by reacting iodine with ethane.
Complete the equations for some possible steps in the formation of chloroethane.