ME100 Basics of Mechanical Engineering Module 1 : Thermo Dynamics

• THERMODYNAMICS

Thermodynamics: 

The science of energy.The name thermodynamics stems from the Greek words therme (heat)and dynamis (power).

Energy: 

The ability to cause changes.

Conservation of energy principle:

During an interaction, energy can change from one form to another but the total

amount of energy remains constant.Energy cannot be created or destroyed.

The first law of thermodynamics: 

An expression of the conservation of energy principle.The first law asserts that energy is a thermodynamic property.

The second law of thermodynamics:

It asserts that energy has quality as well as quantity, and actual processes occur in the direction of decreasing quality of energy.

Classical thermodynamics:

A macroscopic approach to the study of thermodynamics that does not require a knowledge of the behavior of individual particles.It provides a direct and easy way to the solution of engineering problems and it is used in this text.

Statistical thermodynamics: 

A microscopic approach, based on the average behavior of large groups of individual particles.It is used in this text only in the supporting role.

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