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- 1. Multiple Choice
Given the Born-Haber cycle below, which of the following enthalpy change is not represented by steps a-g
Enthalpy of formation
enthalpy of atomization of calcium
1st electron affinity of bromine
2nd electron affinity of bromine
- 2. Multiple Choice
Identify the enthalpy change represented by letter g.
enthalpy of formation
enthalpy lattice of formation
electro affinity of bromine
enthalpy of atomization of zinc
- 3. Multiple Choice
Calculate the enthalpy change represented by X
+695kJ/mol
-695kJ/mol
-635kJ/mol
-635kJ/mol
- 4. Multiple Choice
which of the following results in decrease in enthropy
- 5. Multiple Choice
1. Calculate the standard entropy change for the following reaction
Cu(s) +1/2 O2(g) =>CUO (s)
Given that
195.66 J/K.mol
93.09 J/K.mol
-93.09 J/K.mol
+195.66 J/K.mol
- 6. Multiple Choice
-41.10 J/mol.K
+165.29J/mol.K
+41.10 J/mol.K
-165.29J/mol.K
- 7. Multiple Choice
-63.8 J/mol.k
+63.8 J/mol.k
+176.7 J/mol.k
-50.7 J/mol.k
- 8. Multiple Choice
-36.6 J/K
-175.7 J/K
-83.4J/K
+83.4J/K
- 9. Multiple Choice
Which equation represents the process that occurs when the standard enthalpy of atomisation of iodine is measured?
0.5I2(s) → I(g)
I2(s) → 2I(g)
0.5I2(g) → I(g)
I2(g) → 2I(g)
- 10. Multiple Choice
Which enthalpy change is NOT required in a Born Haber cycle for aluminium chloride
2nd ionisation energy of aluminium
2nd electron affinity of chlorine
Lattice enthalpy of aluminium chloride
Enthalpy of formation of aluminium chloride
- 11. Multiple Choice
Which equation shows an enthalpy of atomisation?
(l) → Cl(g)
(g) → 2Cl(g)
(l) → 2Cl(g)
(g) → Cl(g)
- 12. Multiple Choice
Standard enthalpy change of combustion is defined as the enthalpy change when
1 mole of compound is burnt in oxygen.
1 mole of compound is completely burnt in oxygen under standard conditions of 298K and 100 KPa.
1 mole of compound is burnt under oxygen at 293K and 100 KPa.
1 mole of oxygen is used to burn a compound under standard conditions of 298K and 100 KPa.
- 13. Multiple Choice
Standard enthalpy change of formation of a substance is defined as
the enthalpy change when 1 mole of the substance is formed from its elements under standard conditions of 298K and 100 KPa.
the energy released when 1 mole of the substance is formed from its elements under standard conditions of 298K and 100 KPa.
the enthalpy change when 1 mole of elements is used to form a substance under standard conditions of 298K and 100 KPa.
the energy released when 1 mole of elements is used to form a substance under standard conditions of 298K and 100 KPa.
- 14. Multiple Choice
Lattice energy of an ionic solid is defined as
the enthalpy change when 1 mole of the ionic solid is formed from its separate ions.
the enthalpy change when 1 mole of the ionic solid is formed from its separate gaseous ions.
the enthalpy change when 1 mole of the ionic solid is separated into its separate gaseous ions.
the enthalpy change required to break 1 mole of ionic bonds to form separate ions.
- 15. Multiple Choice
Standard enthalpy of atomisation is defined as the enthalpy change when
1 mole of atoms is formed in a reaction under standard conditions of 298 K and 100 KPa.
1 mole of separate gaseous atoms of the element is formed from the element under standard conditions of 298 K and 100 KPa.
1 mole of an element is atomised to form separate gaseous atoms under standard conditions of 298 K and 100 KPa.
1 mole of a compound is broken down into its individual atoms under standard conditions of 298 K and 100 KPa.
- 16. Multiple Choice
First ionisation energy (IE) is defined as
the enthalpy change when 1 mole of electrons is removed from 1 mole of atoms to form 1 mole of gaseous cations.
the energy required to remove 1 mole of electrons from 1 mole of cations to form 1 mole of +2 gaseous cations.
the enthalpy change when 1 mole of electrons is removed from 1 mole of separate gaseous atoms to form 1 mole of gaseous cations.
the enthalpy change when 1 mole of electrons is removed from 1 mole of separate atoms to form 1 mole of cations.
- 17. Multiple Choice
Electron affinity (EA) of an element is defined as
the enthalpy change when 1 mole of electrons is added to 1 mole of atoms to form 1 mole of anions.
the enthalpy change when 1 mole of electrons is added to 1 mole of gaseous atoms to form 1 mole of gaseous anions.
the enthalpy change when 1 mole of electrons is added to 1 mole of atoms to form 1 mole of gaseous anions.
the enthalpy change when 1 mole of electrons is added to 1 mole of gaseous anions to form 1 mole of gaseous anions.
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