enthalpy and entropy

Question 1

lattice enthalpy

Answer 1

formation of one mole of ionic lattice from gaseous ions

Question 2

enthalpy change of solution

Answer 2

energy change when one mole of solute is completely dissolved
KCL(s)+aq=kcl(aq)

Question 3

enthalpy of hydration

Answer 3

enthalpy change when one mole of gaseous ions react and are dissolved in water
Mg2+(g)+aq=Mg2+(aq)

Question 4

enthalpy change of atomisation

Answer 4

enthalpy change when one mole of gaseous atoms is formed from its elements
Na(s)=Na(g)

Question 5

electron affinity

Answer 5

amount of energy released when an electron is added to a neutral atom
X +E-=X-

Question 6

whats significant about this temperature

Answer 6

above this temperature the reaction is feasible

Question 7

feasible reaction

Answer 7

is where ΔG ≤ O

Question 8

effect of solubility if temperature increases

Answer 8

solubility decreases as enthalpy of solution is exothermic so equilibrium is displaced as predicted by le chatelier

Question 9

enthalpy change meaning

Answer 9

heat energy change measured at constant pressure