Question

What is first law of thermodynamics ​

Answer 1

Answer:

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic work, and relating them to a function of a body's state, called Internal energy

Answer 2

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Energy of total universe is always conserved

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OR

Total energy of an isolated system is always conserved

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OR

hence absolute value of E can can never be calculated only change in of E can can be calculated for a particular process

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