Question

explain first law of thermodynamics

Answer 1

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed.

Answer 2

$\matgbb{FIRST\: LAW\: OF\: THERMODYNAMICS:}$

Now that we have an understanding of basic concepts of thermodynamics we will discuss the principles or loss of this fascinating branch of science these loss or not parents with detective proof but generalisation of several experimental and observed facts .

First law of thermodynamics was proposed by Joule in 1851 as a corollary of conservation of energy .
The conservation of energy principle states that
"" Energy can neither be created nor be destroyed but can only be transferred into alternate forms ""
More precisely first law can be stated as follows :

The change in internal energy of a system is equal to the sum of heat energy given to the system and the energy given to the system in the form of work .
This statement is a corollary of following general statements ;

⏩Total energy of an isolated system remains constant
⏩Universe is an isolated system the energy of the universe is conserved the energy change in the system and its surroundings are equal in magnitude but opposite in sign
⏩It is impossible to construct a perpetual motion machine of the first kind( a machine that does work continuously without consuming fuel or some other source of energy )



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