Top answers

What is the difference between London dispersion forces and hydrogen bonds?

Both are a type of inter molecular forces which means they act between more than 1 molecules. Do not confuse them with intra molecular forces acting within 1 molecule. London dispersion forces act between al...
DS
Answered by Daria S. • Chemistry tutor
29260 Views

How does a change in temperature affect the Kc value when the forward reaction is exothermic?

To explain this I will use a made up example question: A 2(g) + B 2(g) <-> 2AB Change in enthalpy= Negative remember: according to Le Chatlier's principle, if a system in equilibrium is subjected to ch...
RO
Answered by Ruairi O. • Chemistry tutor
12329 Views

Explain the trends in reactivity as you move down group one elements.

As you move down group one atomic radius increases. As a result the attraction to outer electrons is weaker. As there are an increased number of energy levels, shielding to the outer electrons also increases...
JJ
Answered by Jack J. • Chemistry tutor
3760 Views

Explain how fractional distillation works.

Hydrocarbons have different boiling points and therefore different condensation points. The linger the hydrocarbon, the more intermolecular forces exerting between each molecule. This means that it requires ...
NS
Answered by Nick S. • Chemistry tutor
7737 Views

Explain the trend in 1st ionisation energy across the period 3 elements, explaining the anomalies of aluminium and sulfur.

The overall trend is that the 1st ionisation energy increases . This is because as the nuclear charge increases , the attraction of the nucleus to the surrounding electrons becomes stronger . This means that...
JW
Answered by Jack W. • Chemistry tutor
12305 Views