Skip main navigation

The first law- conservation of energy

The first law- conservation of energy
Welcome to thermodynamics in energy engineering first week. During the 1st and 2nd weeks, we will talking about the first law thermodynamics The first law of thermodynamics is the energy principle. It is simply called the conservation of energy. Energy is conserved that is, the energy is neither created nor destroyed. So for the closed system, the difference between energy input and energy output must be the energy change inside the system. But we need to keep in mind that, although the total energy is conserved, energy takes various different forms, but the form of energy can be converted. Let’s analyze the energy that can be stored in the system.
The energy of our system can be divided into three categories: kinetic energy, potential energy and the internal energy U. Kinetic energy refers to the energy related to its overall motion either translational or rotational. The potential energy is a sum of gravitational, centrifugal, electric and magnetic potential energies. Internal energy depends on the inherent properties of materials in the system such as composition and the phase, physical form. In many cases, KE and PE are not very significant and we ignore their contribution to the total energy of the system and only consider internal energy.

This video highlights the first law of thermodynamics, the conservation of energy.

The first law of thermodynamics is the energy principle. It states that the energy is nether created or destroyed, thus conserved.

This article is from the free online

Thermodynamics in Energy Engineering

Created by
FutureLearn - Learning For Life

Our purpose is to transform access to education.

We offer a diverse selection of courses from leading universities and cultural institutions from around the world. These are delivered one step at a time, and are accessible on mobile, tablet and desktop, so you can fit learning around your life.

We believe learning should be an enjoyable, social experience, so our courses offer the opportunity to discuss what you’re learning with others as you go, helping you make fresh discoveries and form new ideas.
You can unlock new opportunities with unlimited access to hundreds of online short courses for a year by subscribing to our Unlimited package. Build your knowledge with top universities and organisations.

Learn more about how FutureLearn is transforming access to education