Chemistry Gas Laws....PV=nRT?

We should know R is constant. PV=nRT So nR =PV/T if you have a balloon of gas(n mole) when you change one of P,V or T that makes the others changes. However the amount of mole does not changes.

(PV/T)1 = (PV/T)2 because of n and R If The temperature does not change , (PV)1 = (PV)2 that is Boyle's law If The pressure does not change , (V/T)1 = (V/T)2 that is Charles' law If The volume does not change , (P/T)1 = (P/T)2 that is gay-lussacs' law If all changes , (PV/T)1 = (PV/T)2 If P,V ,T and n change PV =nRT R = PV/nT = constant (PV/nT)1 = (PV/nT)2.

PV=nRT is an ideal gas equation. On combining boyles law(volume is inversely proportional to pressure of the gas at constant temp),Charles law(at constant pressure, volume of the gas is directly proportional to the temp) and gaylussaacs law(at constant volume,the pressure the gas is directly proportional to temp of the gas) ,we get- P1V1/T1=P2V2/T2 and this is called combination of gas law. R is the gas constant.

The temp should be converted to kelvin. N is no. Of moles of gases.

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