Energetics 2

Question 1

What has an effect on lattice enthalpy?

Answer 1

size of the charge of the ion.
ionic radius (size of ion).

Question 2

What is assumed for theoretical data?

Answer 2

Ions are in contact.
Ions are spherical.
Point charge.

Question 3

Increased polarisation means:

Answer 3

More covalent character.

Question 4

What does degree of polarisation depend on?

Answer 4

Radius of ion.
Charge of ion.

Question 5

Factors affecting cation polarising power:

Answer 5

smaller radius= more polarising
larger charge= more polarising

Question 6

Factors affecting anion ability to be polarised:

Answer 6

smaller radius= less polarised
larger charge= more polarised

Question 7

Enthalpy of solution

Answer 7

Enthalpy change when one mole of an ionic solid dissolves in water to form an infinitely dilute solution.

Question 8

Enthalpy of hydration

Answer 8

Enthalpy change when one mole of an ion in its gaseous state is completely hydrated by water.

Question 9

How is enthalpy of solution calculated?

Answer 9

By extrapolation of a graph

Question 10

Lattice enthalpy + Enthalpy of solution=

Answer 10

Enthalpy of hydration