Question

Temperature remaining constant the product of volume and pressure pf a given mass of dry gas is a constant. Give reason

Answer 1

Hello
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If pressure remains constant :

Then 

According to Boyle's law 

V α 1/P

and 

V = K x 1/P 

OR VP = k 

hence product of pressure and volume is constant 

Answer 2

The volume of a given mass of a dry gas is inversely proportional to its pressure it constant temperature. Boyle's law may also be stated as the product of the volume and pressure of a given mass of a dry gas at a constant temperature is constant.