6.1.1 Benzene and Aromatic Compounds Flashcards
1
Q
What are the properties of benzene?
A
- Colourless
- Highly flammable liquid
- Naturally found in crude oil and in cigarette smoke.
2
Q
What observations are made when bromine water is mixed with the kekule’s model of benzene?
A
- Bromine water turns colourless.
3
Q
What observations are made when bromine water is mixed with the delocalised ring version of benzene?
A
- Bromine water stays orange.
4
Q
What is required for bromination of a benzene to occur?
A
- A catalyst.
5
Q
Can alkenes react with bromine without a catalyst?
A
- Yes.
6
Q
Are the C-C bonds in benzene equal?
A
- Yes.
7
Q
What is the change in heat for hydrogenation of cyclohexene?
A
-120.
8
Q
What would the value be for the change in heat if benzene contained three double bonds?
A
-360.
9
Q
What is the value of enthalpy of hydrogenation of a benzene ring?
A
-208.
