Gaseous sodium ions may be produced from sodium atoms. $\text{Na(s)} \rightarrow \text{Na}^+(\text{g})$ Which quantities must be used to work out the enthalpy change of formation of $\text{Na}^+(\text{g})$?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only