In thermodynamics, an isothermal process is a type of thermodynamic process in which the temperature of the system remains constant: ΔT = 0.

What does zero equal in isothermal process?

For an ideal gas, in an isothermal process, ΔU=0=Q−W, so Q=W. In Isothermal process the temperature is constant. The internal energy is a state function dependent on temperature. Hence, the internal energy change is zero.

Is Q 0 in isothermal process?

For an isothermal reaction, the change will happen slowly enough to enable the system go back to the initial temperature by heat exchange(q), so q can never be zero in this process.