The Laws Of Thermodynamics: The Importance Of Energy
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Energy is a property of objects which can be transferred to other objects or converted into different forms. Thermodynamics definition states the importance of energy, ‘the branch of physical science that deals with the relations between heat and other forms of energy (such as mechanical, electrical, or chemical energy), and, by extension, of the relationships between all forms of energy.’
For a fixed quantity of gas, pressure is proportional to temperature and inversely proportional to volume. Therefore, ways to get (heat) energy out of a system:
1. Change in temperature - a steam engine works by heating and then cooling of steam.
2. Change in pressure - a windmill.
3. Change in volume - a gas rushing against a piston, gasoline engine (sudden…show more content… Brownian motion can be defined as the observed jiggling and random movement of microscopic particles caused by the impacts of moving molecules in the medium.
The laws of thermodynamics are like the roots of the field of thermodynamics. It is fully incorporated with energy. The first law is about the conservation of energy. It states that energy can neither be created nor be destroyed. It is also stated as the change of internal energy of a system is always equal to the sum of heat supplied to the system and the work done on the system on the surroundings.
The second law of thermodynamics states that the total entropy of an isolated system always increases over time, or remains constant in ideal cases where the system is in a steady state or undergoing a reversible process. The increase in entropy accounts for the irreversibility of natural processes, and the asymmetry between future and past. Or in terms of energy, it talks about the availability of useful energy. It talks about the fact that you cannot transfer heat from a lower temperature to a higher temperature without using energy; the available useful energy dissipates; randomness or entropy of the system