Identify the number of parameters that have extensive properties:

mass, volume, internal energy, enthalpy, heat capacity, temperature, density and pressure

A property of a system, whose magnitude depends upon the amount of matter, is known as extensive property. Properties like mass, volume, internal energy, heat content, free energy, enthalpy, entropy, heat capacity, surface area, energy, etc. are dependent upon the mass of the system and are called extensive properties.

Among the given parameters, mass, volume, internal energy, enthalpy and heat capacity are extensive properties. Therefore, the answer is 5.