First Law of Thermodynamics and Expression for Internal Energy

March 3, 2025 • Science

Swaraj Barik

teacher

The document presents information about the first law of thermodynamics. It states that the first law holds that the total energy of an isolated system is constant; energy can be transformed from one form to another but cannot be created or destroyed. The first law is expressed as ΔU=Q-W, where ΔU is the change in the internal energy of the system, Q is the heat added to the system, and W is the work done by the system. Some limitations of the first law are that it does not specify the direction of heat flow or determine if a process is possible.