What does the term free radical mean?
Suggest an equation for one possible termination step in this process. A possible propagation step is $\text{NH}_2\text{Cl} + \cdot\text{Cl} \rightarrow \cdot\text{NHCl} + \text{HCl}$.
Draw the dot-and-cross diagram for $\text{NH}_2\text{Cl}$, using only outer electrons.
State the hybridisation of the nitrogen atom and suggest the $\text{H-N-Cl}$ bond angle in the $\text{NH}_2\text{Cl}$ molecule.
Define what is meant by the term entropy.
Calculate the standard entropy change, $\Delta S^{\circ}$, for the reaction.
Calculate the standard enthalpy change, $\Delta H^{\circ}$, for the reaction.
Calculate the standard Gibbs free energy change, $\Delta G^{\circ}$, for this reaction at $298\,\text{K}$.
Explain, with reference to $\Delta G^{\circ}$, why this reaction becomes less feasible when the temperature is higher.
Compare the basicities of ammonia, ethylamine and phenylamine, and explain your answer.