Enthalpy Definitions
Thermodynamics Worksheet
Write equations for the following terms
1. Enthalpy of formation of sodium oxide.
2Na(s) + ½O2(g)
→
Na2O(s)
2. Enthalpy of combustion of glucose.
C6H12O6(s) + 6O2(g)
→
6CO2(g) + 6H2O(l)
3. Enthalpy of neutralisation of sulfuric acid and calcium hydroxide.
½H2SO4 + ½Ca(OH)2
→
½CaSO4 + H2O
4. Enthalpy of atomisation of chlorine.
½Cl2(g)
→
Cl(g)
5. Bond dissociation enthalpy of oxygen.
O2(g)
→
2O(g)
6. First ionisation enthalpy of magnesium.
Mg(g)
→
Mg+(g) + e–
7. Second ionisation enthalpy of aluminium.
Al+(g)
→
Al2+(g) + e–
8. Enthalpy of fusion of decane.
C10H22(s)
→
C10H22(l)
9. Lattice enthalpy of dissociation of magnesium chloride.
MgCl2(s)
→
Mg2+(g) + 2Cl–(g)
10. Lattice enthalpy of formation of sodium nitride.
3Na+(g) + N3-(g)
→
Na3N(s)
11. Enthalpy of solution of sodium bromide.
NaBr(s)
→
Na+(aq) + Br–(aq)
12. Enthalpy of hydration of calcium ions.
Ca2+(g)
→
Ca2+(aq)
13. Enthalpy of vaporisation of ethanol.
C2H5OH(l)
→
C2H5OH(g)
14. First electron affinity of chlorine.
Cl(g) + e–
→
Cl–(g)
15. Second electron affinity of oxygen.
O–(g) + e–
→
O2-(g)