THERMODYNAMICS

Question 1

Lattic enthalpy

Answer 1

lattice enthalpy can be defined as the enthalpy change when 1 mole of a solid ionic lattice is fromed from its gaseous atoms in its standard state under standard conditions.

Question 2

enthalpy change of formation

Answer 2

enthalpy change of formation can be defined as the enthalpy change when 1 mole of a compound is fromed from its constituent elememts in their standard states.

Question 3

enthalpy change of atomisation

Answer 3

the enthalpy change when 1 mole of gaseos atoms is fromed from its elements in their standard states.

Question 4

first ionisation energy

Answer 4

first ionisation energy is the enthalpy change when 1 mole of gaseous 1+ ions is fromed from its gaseous atoms.

Question 5

second ionisation energy

Answer 5

the enthalpy change when one mole of gaseous 2+ ions is formed from one mole of gaseous 1+ ions.

Question 6

first electron affinity

Answer 6

enthalpy change when one mole of gaseous 1- ions is formed from its gaseous atoms.

Question 7

second electron affinity

Answer 7

enthalpy change when one mole of gaseous 2- ions is fromed from 1 mole of gaseous 1- ions.

Question 8

enthalpy change of hydration

Answer 8

enthalpy change when one mole of aqueous ions is fromed from its gaseous ions.

Question 9

enthalpy change of solution

Answer 9

enthalpy change when 1 mole of an ionic substance dissolves in enough solvent to form an infintely dilute solution.

Question 10

entropy

Answer 10

the measure of a disorder of a system.

Question 11

what is the entropy at absolute zero temperature

Answer 11

zero as the particles are not moving and has a disorder.