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Gas Equation

Gas Equation

 

source :theyoungscottishphysicist.co.uk

According to Boyle’s law

V ∝   1/P                                   (T is constant)

According to Charle’s Law

V ∝   T                                      (P is constant)

Combining these two laws,

V ∝   T/P

PV   ∝  T

PV = KT

PV/T  = constant

K is a constant

 

For one mole of gas, the constant K is replaced by R. Since the value of R is same for each gas, it is known as universal gas constant

PV = RT ———gas eq.

P=Pressure of gas

V= Vol. of 1 mole of gas

T= Temperature in Kelvin (Absolute Temp.)

R= Universal gas constant

Gas Eq. for n mole of gas,

PV =nRT      ( Gas  equ. )

n= no. of moles of Gas

Above gas eq. may be written as,

n = w/m

PV = w/m (RT) ——–gas equation

w=weight or mass in grams

m=molecular weight of gas

density of gas d = w/v

P = DRT/m                            gas equ.


 

Saroj Bhatia: Dr. Saroj Bhatia is an Ph.D in chemistry who has been teaching chemistry for over a decade. Currently she is a respected principal of a renowned college in her hometown. She took this medium for online users. Her proudest achievement is helping people learn chemistry.
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