Thermodynamics

Question 1

Define enthalpy change of solution

Answer 1

1 mole of solute dissolves in water

Question 2

What happens if Hsol is negative?

Answer 2

More energy is released than used up so is more likely to dissolve

Question 3

Define enthalpy of hydration?

Answer 3

1 mole of gaseous ions is hydrated by water

Question 4

Define entropy

Answer 4

measure of energy absorbed or released based on disorder or dispersal of energy

Question 5

Describe feasibility

Answer 5

Needs to be negative
Limits- rate of reaction too slow
If H and S are negative not feasible, H favours reaction but T resists change
Feasible if H>TS more likely at high temps