Transformations at constant temperature (Delta T = 0)
An
isothermal process is a thermodynamic process in which the temperature of the
system remains constant. The heat transfer into or out of the system typically
must happen at such a slow rate that the thermal equilibrium is maintained. In a
phase diagram, an isothermal process is indicated by following a vertical line along
a constant temperature.
Therefore,
if the pressure and volume change, it is possible for a substance to change its
state of matter even while its temperature remains constant,
if you're careful about how you apply or remove heat from the system.
if you're careful about how you apply or remove heat from the system.
