Internal energy Energy which a substance possesses because of the motion and configuration of its atoms, molecules, and subatomic particles. Irreversible process is one in which a portion of the original system energy is dissipated and cannot be returned to the system through its own operation. Isentrop Is a process taking place without any heat exchange with the surroundings. The ratio of the real gas isentropic power consumption to shaft input. The power which is theoretically required to compress a gas under constant entropy from a given inlet pressure to a given discharge pressure.
Isobar Is a process taking place under constant pressure.
To change the volume from state 1 to state 2, heat must be removed. The temperature change is proportional to the change in specific volume. Isochor Is a process taking place under constant volume. To raise the pressure from state 1 to state 2, heat must be added. The pressure change is proportional to the change in temperature.