Chemistry Paper 1 Mistakes Flashcards
1
Q
Difference between enthalpy of atomisation and bond dissociation enthalpy in born haber calculations
A
Enthalpy of atomisation = 1/2 x bond dissociation
2
Q
How to calculate enthalpy of formation from a born haber cycle
A
Enthalpy of formation = everything else added together
3
Q
Why does the EMF of the cell decreases to 0V
A
The concentrations of the ions in the two solutions become equal
4
Q
In terms of electrostatic forces, suggest why the electron affinity of fluorine has a negative value
A
There is an attraction between the electron and nucleus.
Energy is released when electron is gained.
5
Q
Define enthalpy of hydration of an ion
A
The enthalpy change when 1 mol of a gaseous ion forms aqueous ions
