charles' law.

Charles ' law:

Before getting into the concept I would like to provide a overview of this law to my readers.

The constant terms in this law are Mass and Pressure. Whereas, the variable terms in this law are Temperature and Volume.

the simple mathematical concept of this is that at constant pressure and mass, V varies directly as T.Now, I am going to tell you the actual statement or definition of this law. which is 

"The volume of a given mass of gas at constant Pressure, expands or contracts by a fixed fraction 1/273 part of its initial volume at 0°C per degree Celsius rise or fall in temperature." the mathematical formula(needed to solve numericals accomodated with this law) of this law is given in the photo below :- 

it can be said from the statement that, at t°C temperature, 

V= Vo(1+t°C/273) = Vo(T k/273)

where, 

V=final volume of the gas

Vo = initial volume of the gas 

therefore, at -273°C 

V=Vo(1-273/273)=0.

from this we can define absolute zero temperature. 

DEFINITION OF ABSOLUTE ZERO TEMPERATURE:

According to the Charles' law , at constant Pressure,  the temperature (-273°C) at which , theoretically a gas would have no volume,  is known as Absolute zero temperature. 

DEFINITION OF ABSOLUTE SCALE OF TEMPERATURE:

The scale of temperature made by  Kelvin by keeping -273°C 

as lower fixed point and 

its 1° reading is equal to

1°C , is called absolute scale of temperature.