Physical and Chemical changes in an alkanes

All three physical propertities/chanes

1) Higher molar mass/carbon atoms = higher melting/boiling point
2) Greater branches = lower melting/boiling point
3) Solubility

Why does higher molar mass means higher melting point?

More molar mass means more molecular force; therefore, more heat is required to overcome to the force

Why does greater branching means lower boiling point?

Sphere-like shape has less surface area to work with; therefore, straight chain has more surface area = more heat is required

How and why does solubility affect the physical change?

Alkanes do not dissolve in water because they do not release enough energy to break the hydrogen atoms between the water molecules, and alkanes lack the amount of hydrogen atoms.

Why do all chemical properties affect all alkanes?

Because all alkanes have a C-C and C-H bond

When does chemical change occur?

Exposed to the halogen group and light

Will they react/change in the dark?

No, they won’t