Thermodynamics

Question 1

What is the definition for enthalpy of formation

Answer 1

The enthalpy change when 1 mole of compound is formed from 1 mole of its elements, in standard states and under standard conditions.

Question 2

What is the detention of lattice enthalpy of formation

Answer 2

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

Question 3

What is the definition of lattice enthalpy of dissociation?

Answer 3

The enthalpy change when 1 mole of solid compound dissociates into 1 mole of it’s gaseous ions

Question 4

What is the definition of enthalpy of dissociation?

Answer 4

When 1 mole of the same type of molecule in the gaseous state is broken

Question 5

What is the definition of enthalpy of 1st ionisation

Answer 5

When 1 mole of gaseous 1+ ions are formed from 1 mole of gaseous atoms

Question 6

What is the definition of enthalpy of atomisation

Answer 6

When 1 mole of gaseous atoms is made from an element in its standard state

Question 7

What is the detention of 2nd ionisation

Answer 7

When 1 mole of gaseous 2+ ions is formed from 1 mole of gaseous 1+ ions

Question 8

What is the definition of enthalpy of electron affinity

Answer 8

When 1 mole of gaseous 1- ions is formed from 1 mole of gaseous atoms

Question 9

What is the detention of enthalpy of 2- electron affinity?

Answer 9

When 1 mole of gaseous 2- ions is formed from 1 mole of gaseous 1- ions

Question 10

What is the definition of enthalpy change?

Answer 10

Heat change at a constant pressure

Question 11

What is an example equation for enthalpy solution of magnesium chloride?

Answer 11

MgCl2 (s) -> Mg2+ (aq) + 2Cl- (aq)