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How does increasing chain length alter the melting and boiling temperatures?

For a substance to melt or boil, heat energy must be supplied. This is to overcome Van der Waals forces. As the length of a chain increases, there are more Van der Waals forces present due to the chain getti...
RS
Answered by Rhea S. • Chemistry tutor
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Why does phenol react more readily with bromine than benzene?

The oxygen on the OH (of the phenol) has a lone pair which it donates into the delocalised pi system of the ringThis activates the ring and there is now a high electron density.This is now strong enough to p...
LK
Answered by Leah K. • Chemistry tutor
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Explain: 1. Why butanoic acid has a higher boiling point than butan1-ol? 2. Why carboxylic acids of short chain length are more soluble in water than those with longer carbon chain length?

1 .Butanoic acid has stronger intermolecular forces (hydrogen bonding) because it has two highly electronegative oxygen atoms in its structure, whereas butan-1-ol has only one. Therefore the acid molecules c...
SL
Answered by Samuel L. • Chemistry tutor
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State the element in period 3 that has the highest melting point and explain your answer.

Silicon has a Chrystal structure with many covalent bonds between atoms. Covalent bonds are strong and need a large amount of energy to be broken in order to melt Silicon.
LB
Answered by Lily B. • Chemistry tutor
4828 Views

What is hydrogen bonding and why does water have a higher boiling point than methanol?

Hydrogen bonding is an intermolecular interaction between a partially positively charged hydrogen atom on one molecule and a partially negatively charged atom on another molecule. The difference in charge is...
MQ
Answered by Max Q. • Chemistry tutor
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