An isothermal process is a change in a system where the temperature stays constant (delta T =0).
A practical example of this is some heat engines which work on the basis of the carnot cycle. The carnot cycle works on the basis of isothermal.
Isothermal process is a process in which change in pressure and volume takes place at a constant temperature.
An isothermal process is one in which the temperature remains constant throughout. This means that the internal energy of the system remains constant as well. In an isothermal process, the heat added to or removed from the system is balanced by the work done by or on the system.
In thermodynamics, the key difference between an adiabatic and isothermal graph is how heat is transferred. In an adiabatic process, there is no heat exchange with the surroundings, while in an isothermal process, the temperature remains constant throughout the process.
Temperature is constant during an isothermal process. The work done (W) is equal to the heat added (Q). The change in internal energy (ΔU) is zero for an isothermal process. The pressure can vary during an isothermal process, depending on the specific conditions.
In an isothermal process, the temperature remains constant. Therefore, the enthalpy change is directly proportional to the temperature change.