Ideal Gas Equation!

[Click]

In equation PV=nRT, why do we need to multiply no of moles with R (molar gas constant)? :?
Got it till pressure, volume and temperature but why R? and how is PV/T directly proportional to n? Iam sort of confused with n and R... If someone can explain this... plzzzzz........... :!:

And what is R? :?: :?: :?: :?: :?:

 

[beacon_of_light]

You just need to know that PV =nRT ...derivation of the equation is not in our syllabus ... R is known as a molar gas constant

And the point of proportionality ... since R is a constant in the equation so PV/n is a constant ... common sense

 

[Rajendra bogati]

in eqn pv=nrt .. n and r are constant so pv/t also should constant....... where R is the constant which value is 8.31 ...got it??

 

[Click]

@Raj...... u mean pv/t=Constant and constant is replaced by nR, right?
There is another thing mentioned in the book that Constant of this equation depends on the mass as it is fixed.

So in short, is this nR =Mass? And do we need to know anything about R other than that it is molar gas constant with units of J/mol K?

 

[Nikesh]

nR might be equal to mass in some extent as number of moles can b converted into gram molecular weight \molar mass!!!!!!!!!!
and when it is multiplied with the constant R it again gives the unit of mass...........
Dont get me wrong coz i jus think it to b true!!!!!!!!!!!!

 

[farrukh]

this equation results from combining three gas laws

Combining boyles, and charles law we get

(PV)/T=constant

Avogadros law states vol of gas is directly proportional to the number of moles at constant temperature
V α n

Therefore

(PV)/T = constant*n
shifting T to right hand side

PV=constant*R*T

The constant is known as universal gas constant R and velueis 8.314 J/mol K