
Interpretation: How wander Waals equation simplifies to the
Concept introduction:
By combining the three gaseous laws namely Boyle’s law, Charles’s law and
According to ideal gas law,
Where,
P = pressure in atmospheres
V= volumes in liters
n = number of moles
R =universal gas constant (
T = temperature in kelvins
Ideal gas law tends to hold best at low pressure and high temperature
A modified ideal gas equation on account of molecular size and molecular interaction forces is termed as Van der Waals equation.
That is,
‘a’ and ‘b’ is called Van der Waals coefficient and are characteristic of the individual gas
- a is a measure of intermolecular attraction
- b is a measure of size of the molecule
Where,
P = pressure in atmospheres
V= volumes in liters
n = number of moles
R =universal gas constant (
T = temperature in kelvins

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Chapter 8 Solutions
Chemistry: An Atoms First Approach
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