First law of thermodynamics in calculator

The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed in an isolated system; it can only change forms. Mathematically, it can be expressed as:

Where:

  • ΔU represents the change in internal energy of the system.
  • Q represents the heat added to the system.
  • W represents the work done by the system.

The units for these quantities are as follows:

  • ΔU (change in internal energy): joules (J) or calories (Cal)
  • Q (heat): joules (J) or calories (Cal)
  • W (work): joules (J) or calories (Cal)

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