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The laws of thermodynamics are a set of scientific laws which define a group of physical quantities, such as temperature, energy, and entropy, that characterize thermodynamic systems in thermodynamic equilibrium.
Laws of thermodynamics, four relations underlying thermodynamics, the branch of physics concerning heat, work, temperature, and energy and the transfer of such energy. The first and second laws were formally stated in works by German physicist Rudolf Clausius and Scottish physicist William Thomson.
The First Law of Thermodynamics states that energy can be converted from one form to another with the interaction of heat, work and internal energy, but it cannot be created nor destroyed, under any circumstances.
The laws of thermodynamics describe the relationship between matter and energy and how they relate to temperature and entropy. Many texts list the three laws of thermodynamics, but really there are four laws (although the 4th law is called the zeroeth law).
Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.
The first law of thermodynamics is given as \(\Delta U = Q - W\), where \(\Delta U\) is the change in internal energy of a system, \(Q\) is the net heat transfer (the sum of all heat transfer into and out of the system), and \(W\) is the net work done (the sum of all work done on or by the system).
The results of thermodynamics are all contained implicitly in certain apparently simple statements called the laws of thermodynamics. At the time when Carnot lived, the first law of thermodynamics, the conservation of energy, was not known.
There are four laws of thermodynamics and are given below: Zeroth law of thermodynamics; First law of thermodynamics; Second law of thermodynamics; Third law of thermodynamics; In the next few sections, we will discuss each of the laws of thermodynamics in detail.
Thermodynamics is the study of how heat moves around in ‘macroscopic’ objects. Through-out these lectures, we will talk a lot about laws and models. Models are a simpliļ¬ed, empirical description of a real system which generally develops overtime as our knowledge progresses.
The first law of thermodynamics thinks big: it deals with the total amount of energy in the universe, and in particular, it states that this total amount does not change. Put another way, the First Law of Thermodynamics states that energy cannot be created or destroyed.