A process that has no transfer of heat is usually referred to as "adiabatic".
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A process that occurs without a change in pressure is an isobaric process. In an isobaric process, the pressure of the system remains constant while other properties such as volume or temperature may change.
Isobaric process. See Wikipedia link in the related links section for more information.
An isobaric process is a thermodynamic process that occurs at a constant pressure. This means that the system is allowed to exchange heat with its surroundings but the pressure remains the same throughout the process. In an isobaric process, the work done is determined by the change in volume of the system.
Sublimation is the phase change from solid to gas, where a substance transitions directly from a solid state to a gas state without passing through the liquid state. This process typically occurs under specific temperature and pressure conditions, where the solid's vapor pressure exceeds the ambient pressure.
The work done by an adiabatic process is the change in internal energy of a system without any heat transfer occurring. This means that the work done is solely due to changes in pressure and volume of the system.
Sublimation is the phase change in which a substance changes from a solid directly to a gas or vapor without passing through the liquid phase. This process occurs when the substance's vapor pressure exceeds that of its solid form at a particular temperature.
In an adiabatic process, no heat is exchanged with the surroundings. The work done is the change in internal energy of the system, which is equal to the pressure times the change in volume.