J.CHARLES

                   

       J.Charles
                 J.Carles was born 1746 and died at 1823.He was a 
                 French inventor scientist,mathematician and                                      balloontist .He described in 1802 ,how gases tend 
                 toexpand when heated.  
                  
        "   The relationship between volume and temperature 
            keeping the pressure constant was also studied French
            scientist J.Charles.
            The volume of a given mass of a gas is directly                                   proportional to the absolute temperature if the pressure                     is kept constant".       
                
When the pressure on a sample of a dry gas is held constant, the Kelvin temperature and the volume will be directly related. [1]
this directly proportional relationship can be written as:
V \propto T\,
or

\frac{V}{T}=k
where:

V is the volume of the gas
T is the temperature of the gas (measured in Kelvin).
k is a constant.









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