Van der Waals derived an expression for the ‘pressure defect’, if the observed pressure is denoted as ‘p’ and volume is denoted as ‘V’, the gas pressure in the bulk of the gas is equal to:

Mechanical properties of matter are used to classify and identify materials. Some common mechanical properties include: strength, ductility, hardness, impact resistance, and fracture toughness.  Other properties of matter include: Physical properties: These include mass, volume, density, color, hardness, melting and boiling points, and electrical conductivity. Chemical properties: These include reactivity, flammability, ability to rust, toxicity, acidity, and heat of combustion.  The three basic states of matter are solid, liquid, and gas.    Related Test: A Level Physics Practice Test:... Show more

Mechanical properties of matter are used to classify and identify materials. Some common mechanical properties include: strength, ductility, hardness, impact resistance, and fracture toughness. 

Other properties of matter include:
Physical properties: These include mass, volume, density, color, hardness, melting and boiling points, and electrical conductivity.
Chemical properties: These include reactivity, flammability, ability to rust, toxicity, acidity, and heat of combustion. 

The three basic states of matter are solid, liquid, and gas. 
 

Related Test: A Level Physics Practice Test: Matter and Materials

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