3.1.8 thermodynamics

Question 1

second electron affinity

Answer 1

when 1 move of gaseous 2- ions are made from 1 mole of gaseous ions

O- (g) — O2- (g)

Question 2

enthalpy change of 1st ionisation

Answer 2

when 1 mole of gaseous 1+ ions are made from 1 mole of gaseous atoms

Na(g)— Na+ (g)

Question 3

enthalpy change of solution

Answer 3

when 1 mole of a compound is formed from its element in standard state under standard conditions

2C(s)+2H2(g)—C2H6(g)

Question 4

first electron affinity

Answer 4

when 1 mole of gaseous 1- ions are made from 1 mole of gaseous atoms

O(g) — O- (g)

Question 5

enthalpy change of dissociation

Answer 5

1 mole of bonds of same type of molecule in gaseous state is formed

F2(g) — 2F(g)