# Laws of Thermodynamics

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Laws of Thermodynamics
Joshua Gibbs
Grantham University

First Law of Thermodynamics:
The first law states that Energy can neither be created nor destroyed. Energy just changes its form from one to another. The total energy present in the universe remains constant. Examples of the first law of thermodynamics can be: Electrical Bulbs convert electrical energy to light energy; Mechanical systems in cars convert the heat energy released from petrol into kinetic energy.
Second Law of Thermodynamics
This law states that energy of all forms moves from higher concentration of energy to lesser concentration energy. When energy moves from high concentration to lesser concentration then some energy is dispersed or spreads out. Entropy is a measure of how much energy is spread out in a particular process. Examples are: When we exercise not all of our energy is converted into muscles in fact more energy disperses away in sweat.
The Second Law of Thermodynamics implies that high-quality energy can never be used over again. Once a barrel of Oil is burned its high energy is lost forever. We cannot use the same barrel of oil to burn again. The diesel engine of a generator converts fuel energy into mechanical and thermal energy. During this process of conversion of energy some of the energy is lost or leaked out as heat from the wires of generator or dissipated as heat from the machine. The total amount of energy has not changed but it is now so dispersed that it can never be re-used again. The process of transmission of electrical energy to our homes from power houses also involves the same concept. Electricity is transmitted from high powered wires and during this process wires get heated and some energy is lost as heat in the air. When this electricity reaches our houses it is used to run electrical items like TV, Washing Machine and other things in which it is...

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