Preposition: at

• temperature: Doing the heating in stages reduces the chances that the system will blow up by allowing it to equilibrate at each temperature.

Modifying Another Word

• rapidly: Smaller molecules such as urea will equilibrate most rapidly.

• fully: Even at higher temperatures, there may be problems of having enough time for the solid to fully equilibrate as the system is cooling.

• then: Then equilibrate for a while at 300K before switching to constant pressure.

Preposition: with

• air: The gas in this circuit loses kinetic energy as it strikes the turbine and equilibrates with preheated incoming air entering the combustion chamber.

Preposition: for

• while: Then equilibrate for a while at 300K before switching to constant pressure.