First law of thermodynamics

 The first law of thermodynamics, sometimes referred to as the law of conservation of energy, holds that energy can only be transferred or changed from one form to another and cannot be created or destroyed. This implies that the overall level of energy in a closed system doesn't change. The first law is founded on the idea that energy is a fundamental quantity that can only be converted from one form to another and cannot be created or destroyed. It is a fundamental tenet of physics and has several scientific and engineering applications.

Application of first law of thermodynamics

 This law has many applications in various fields, including:

1. Heat engines: Internal combustion engines and steam turbines are examples of heat engines whose performance is examined using the first law of thermodynamics. It aids in figuring out how much work can be produced with a specific amount of heat input.

2. Air conditioning and refrigeration: The first law of thermodynamics is used to evaluate the efficiency of air conditioning and refrigeration systems. It aids in figuring out how much effort is needed to move heat from a low-temperature to a high-temperature area.

3. Chemical reactions: Chemical reactions can be classified as exothermic (release heat) or endothermic (absorb heat) using the first rule of thermodynamics. Calculating the quantity of heat emitted or absorbed during a reaction.

4.Geothermal energy: Geothermal energy systems, which use the natural heat from the earth's interior to produce power, use the first law of thermodynamics. It aids in figuring out how much energy can be drawn from a particular geothermal source.

Mathematical expression for first law of thermodynamics 

The formula for the first law of thermodynamics is E=q+w, where E is the change in a system's internal energy, q is the total amount of heat that is transferred into and out of it, and w is the total amount of work that is performed on or by the system.

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