Physics · Heat and Thermodynamics

According to the first law of thermodynamics, the internal energy of a system is conserved. This means that the internal energy of a system will be the same at the end of a complete cycle as it was initially, at the beginning of the cycle.

If a cyclic process is carried out on a system, the internal energy of the system will be the same at the end of the process as it was at the beginning of the process. If the cyclic process is reversible, then the internal energy of the system will be the same at the end of the process as it was at the beginning of the process. If the cyclic process is irreversible, then the internal energy of the system may not be the same at the end of the process as it was at the beginning of the process. However, the internal energy of a system will not be twice the initial value after a complete cycle.

The internal energy of a system is a state function, which means that it depends only on the initial and final states of the system and not on the path taken between those states. For a cyclic process, the system returns to its initial state, so the change in internal energy is zero. This means that the internal energy of the system after a complete cycle is the same as the internal energy of the system at the beginning of the cycle. It is not necessarily equal to the internal heat added to the system during the cycle.

According to the first law of thermodynamics, the internal energy of a system is conserved. This means that the internal energy of a system will be the same at the end of a complete cycle as it was initially, at the beginning of the cycle.

For a cyclic process, the net work done by the system is zero, so the work done by the system over a complete cycle is equal in magnitude but opposite in sign to the work done on the system during the reverse cycle. This means that the net work done by the system over a complete cycle is zero. So, initial work is not the same as internal energy.