Question

Comment on the following giving reasons:
(a) Why do wet clothes dry quickly on a windy day?
(b) Why is wet bandage placed on forehead of a person suffering from high fever?
(c) Why is it important to know melting point of a substance?
(d) A gas fills completely the vessel in which it is kept.

Answer 1

Answer:

A.Because clothes dry fast in dry air. When the wind blows fast it prevents saturation of moisture thus preventing itself from becoming humid.

B.To lower the temperature of the persons body thus reducing fever.

C. It is important to know the melting point of an substance during an experiment to understand things better and to take any precautions if needed.

D. Because gas molecules have negligible intermolecular attraction.