Name: Factors Affecting the Internal Energy
Uploaded: 2019-07-19
Duration: 3 min 47 s
Description: The internal energy of a thermodynamic system is the energy contained within it. Let's watch the video to learn more about the internal energy of a system.

Question

Extensive properties depend on the quantity of matter but intensive properties do not. Explain whether the following properties are extensive or intensive.
Mass, internal energy, pressure, heat capacity, molar heat capacity, density, mole fraction, specific heat, temperature, and molarity.

Accepted Answer

In thermodynamics, properties of substances are classified into extensive properties and intensive properties.

An extensive property is a property whose value depends on the quantity or size of matter present in the system.

For example, mass, volume, internal energy, enthalpy, and heat capacity are the extensive properties.

A mole of a substance is also an extensive property, as it is the ratio of mass of the substance to the molar mass of the substance.

Intensive properties are the one which does not depend on the quantity or size of matter present.

For example, temperature, density, molarity, mole fraction and pressure are intensive properties.

The ratio of two extensive properties is an intensive property.

For example, $X_{A} = \frac{n_{A} (Extensive)}{n_{B} + n_{A} (Extensive)}$

where, $X_{A}$ represents the mole fraction of a component, $n_{A} and n_{B}$ are the number of moles of the component in the solution.

Extensive properties depend on the quantity of matter but intensive properties do not. Explain whether the following properties are extensive or intensive.
Mass, internal energy, pressure, heat capacity, molar heat capacity, density, mole fraction, specific heat, temperature, and molarity.

Important Questions on Thermodynamics

Learn and Prepare for any exam you want !

Extensive properties depend on the quantity of matter but intensive properties do not. Explain whether the following properties are extensive or intensive. Mass, internal energy, pressure, heat capacity, molar heat capacity, density, mole fraction, specific heat, temperature, and molarity.

Important Questions on Thermodynamics

Learn and Prepare for any exam you want !

Extensive properties depend on the quantity of matter but intensive properties do not. Explain whether the following properties are extensive or intensive.
Mass, internal energy, pressure, heat capacity, molar heat capacity, density, mole fraction, specific heat, temperature, and molarity.