As branching increases, the size of the molecule is more (when compared to its unbranched isomer). Hence there are more number of molecules per unit area / volume. Hence the melting point increases, as branching increases.
Generally melting point and boiling point increase up to group 6 and then decrease.
The melting and boiling points increase down the group because of thevan der Waals forces. The size of the molecules increases down the group. This increase in size means an increase in the strength of the van der Waals forces.
It doesn't increase the melting point of ice, instead, it lowers it. When a solute (which is the salt) is added to a solvent (which is what dissolves it), the boiling point is increased while both the freezing and melting points are decreased. This is evident in the boiling point elevation and the freezing/melting point depression system.
Melting:462 C Boiling: 924 C decomp.
Melting point −209.86°C; boiling point −195.8°C
the boiling points decrease on hydrocarbons as the length of the chain and the weight increases. the melting points increase with length and weight increase. Hope this helps.
Generally melting point and boiling point increase up to group 6 and then decrease.
Add impurities (salt and others) to the substance.
To increase MP and BP point of Zinc u should add some impurities in it. The addition of impurities always decreases the melting point .
Melting and boiling are physical changes.
No. The melting and boiling points of liquids vary considerably.
Melting: -259.14 C Boiling: -252.87 C
When something is melting its evaporation. When something is boiling its condensation.
Melting point -111.7C Boiling point -108.12C
The melting point is 1220.58F. The boiling point is 4566F.
The stronger the intermolecular forces, the higher the melting point and boiling point. The weaker the intermolecular forces, the lower the melting and boiling points are.
The melting and boiling points increase down the group because of thevan der Waals forces. The size of the molecules increases down the group. This increase in size means an increase in the strength of the van der Waals forces.