Question

write Van der Waals equation for n moles of a gas

Answer 1

The van der Waals equation for n moles of a gas is $(P+\dfrac{an^2}{V^2})(V-nb)=nRT$.

• The van der Waals gas equation for n moles of a gas is as follows-
• $(P+\dfrac{an^2}{V^2})(V-nb)=nRT$.
• Here P is the pressure of the gas.
• V is the volume of the gas.
• n is the number of moles.
• a and b are constants.
• R is Ridberg constant.
• T is the temperature of the gas.

Answer 2

Van der Waals equation for n moles of a gas is

$(P+\frac{a}{V^{2} } )(V-b)=RT$

Explanation:

• Van der Waals equation is very widely used in Chemistry and Thermodynamics
• It extends the ideal gas law which include the effect of interaction between molecules of a gas and identifying the finite size of the molecules.

• Van der Waals' equation says that the volume occupied by the non interacting point masses plus the effective volume of the gas molecules is the volume of a real gas

In  Van der Waals equation

$(P+\frac{a}{V^{2} } )(V-b)=RT$

• The constant 'a' is the magnitude of attractive forces which is found between the molecules of the gas

• 'b' is the measure of effective volume which is  occupied by the gas molecules in the van der Waals equation.

• Van der Waals equation is also called co-volume or excluded volume.
• It is an equation which relates the temperature, pressure and volume of a non ideal gas
• It accounts the intermolecular forces between the gas molecules and the volume of the gas molecules.

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