thermodynamics

Question 1

What is Lattice enthalpy of formation

Answer 1

The enthalpy change when 1 mole of a solid ionic compound is formed from its gaseous ions

Question 2

What is Lattice dissociation enthalpy

Answer 2

The enthalpy change when 1 mole of a solid ionic compound is completely dissociated into its gaseous ions

Question 3

What is Enthalpy change of solution

Answer 3

When one mole of a solid ionic substance dissolves in water to produce aqueous ions in an infinitely dilute solution

Question 4

What is Enthalpy change of hydration

Answer 4

The enthalpy change when 1 mole of aqueous ions is formed from gaseous ions

Question 5

what factors affect enthalpy of hydration

Answer 5

the partial negatives and positives of the water are attracted to the ions

the smaller the ion the more strongly attracted to the partial charges of the water molecules are to the ions the larger the enthalpy of hydration

Question 6

what is the definition of the enthalpy of atomisation

Answer 6

when the elements in their standard states form one mole of gaseous ions

Question 8

what factors can produce covalent character

Answer 8

small highly charged positive ions in the lattice

large highly charged negative ions

Question 9

what properties does covalent character affect

Answer 9

the solubility (less) and the conductive ability (less)

Question 10

what is entropy

Answer 10

the measure of disorder or randomness in a system

Question 11

factors that affect entropy

Answer 11

1. state matter
2. energy of the particles
3. dissolving the substance
4. number of particals

Question 12

when is a reaction feasible

Answer 12

when the delta G=0

Question 13

what is ionisation energy

Answer 13

the amount of energy required to remove one mole of electrons from one mole of gaseous ions

Question 14

what is enthalpy of atomisation

Answer 14

enthalpy change when 1 mole of gaseous atoms is formed from its element under standard conditions