Thermo Processes to know.

Isothermal

Temperature of the system stays constant during the process.

Adiabatic

No heat is allowed to enter or leave the system.

Isobaric

Pressure remains constant as the system changes state.

Isochoric

Volume remains constant—no expansion or compression occurs.

Isentropic

Entropy remains constant

Isenthalpic

Enthalpy remains constant

Isochemical

Chemical composition stays fixed with no reactions occurring.

A gas expands while in thermal contact with a large reservoir and the temperature never changes

Isothermal

A piston compresses gas in a perfectly insulated cylinder and the temperature rises sharply

Adiabatic

A device heats a gas while allowing volume to expand so pressure stays constant

Isobaric

A rigid tank is heated from the outside but the volume cannot change

Isochoric

A turbine operates with no heat transfer and the process is reversible

Isentropic

A high-pressure fluid flows through a throttling valve and experiences a temperature change with no heat or work

Isenthalpic

A sealed container undergoes changes with no reactions taking place

Isochemical

A gas expands and cools with no heat flow but the process is irreversible due to friction

Adiabatic (non-isentropic)

A system stays at constant pressure while losing heat, causing its volume to decrease

Isobaric

A rigid container loses heat to the surroundings, lowering its temperature while volume stays fixed

Isochoric

A gas is compressed slowly by a piston while staying in contact with a thermal reservoir to maintain constant temperature

Isothermal

A gas expands so quickly that there’s no time for heat to flow, causing its temperature to drop

Adiabatic

A boiler heats water and steam is allowed to expand at constant pressure

Isobaric

A rigid steel sphere filled with gas is placed in the sun and its temperature increases

Isochoric

A compressor is designed to operate ideally with no heat loss and reversible behavior

Isentropic

Refrigerant passes through an expansion valve where enthalpy is unchanged

Isenthalpic

A reactor tank is heated but the chemical species remain unchanged

Isochemical

An insulated nozzle accelerates a gas with negligible heat transfer and no frictional losses

Isentropic

A gas inside a piston is compressed while perfectly insulated, raising its temperature

Adiabatic

A container with constant volume is connected to a massive reservoir that keeps its temperature fixed

Isothermal