Give the Physical Properties of Haloalkanes

1.	Give the Physical Properties of Haloalkanes
Answer» Physical Properties of Haloalkanes $\rule{200}2$ 1. Boiling point - As the length of the carbon chain increases, surface area increase, vanderwaal FORCE increases. So, boiling point increases. Haloalkanes have high boiling point than their parent hydrocarbon because between haloalkanes strong dipole-dipole forces present. From fluoride to chloride; surface area increases, vanderwaal force increases. So, boiling point also increases. With branching surface area decreases, vanderwaal force decreases. So, boiling point also decreases. Para-isomers have high melting point than the ortho and meta-isomer because para-isomers are symmetrical and have CLOSE packing. → NOTE:- Boiling point increase with the increase in carbon chain but decrease with increase in branching. 2. State - As the number of carbon increases, the surface area increases, vanderwaal force increases. So, they CONVERT from gas to liquid and then liquid to solid. 3. Polarity - Haloalkanes are polar due to the presence of more electro-negative halogens, even though they are insoluble in water. Because alkyl halide make dipole-dipole force with water, which is weaker than Hydrogen bond present between water molecules. 4. Density - Haloalkanes are heavier or DENSER than parent hydrocarbon as well as water.

Answer»

Physical Properties of

$\rule{200}2$

As the length of the carbon chain increases, surface area increase, vanderwaal FORCE increases. So, boiling point increases.
Haloalkanes have high boiling point than their parent hydrocarbon because between haloalkanes strong dipole-dipole forces present.
From fluoride to chloride; surface area increases, vanderwaal force increases. So, boiling point also increases.
With branching surface area decreases, vanderwaal force decreases. So, boiling point also decreases.
Para-isomers have high melting point than the ortho and meta-isomer because para-isomers are symmetrical and have CLOSE packing.

→ NOTE:- Boiling point increase with the increase in carbon chain but decrease with increase in branching.

As the number of carbon increases, the surface area increases, vanderwaal force increases. So, they CONVERT from gas to liquid and then liquid to solid.

Haloalkanes are polar due to the presence of more electro-negative halogens, even though they are insoluble in water. Because alkyl halide make dipole-dipole force with water, which is weaker than Hydrogen bond present between water molecules.