Is energy added or removed from an object when it is frozen in liquid nitrogen and why?

lets say i froze a flower was energy added or removed? did any changes of state occur? if yes, what were they?

Is energy added or removed from an object when it is frozen in liquid nitrogen and why?
The energy flows from the warmer to the cooler objects. The item you place in the liquid N2 is warmer than the N2. The energy flows from the item to the N2 and the item itself gets colder (frozen) while the N2 gets warmer (boils).
Reply:Hi. Energy is removed from the object and transferred to the colder material. A phase change such as freezing or liquefaction may occur.
Reply:removed because the molecules begin to move slower
Reply:You have a thermal transfer of heat from the flower's molecules to the liquid nitrogen (which sublimes). Since heat flows out of the system (the flower), there is a loss of energy (recall ΔE = q + w ).



There is a phase transition of the liquid water in the rose to solid water. There are also likely phase transitions of other molecules from liquid to solid, and of course the nitrogen will sublime which is a phase transition (or change of state).
Reply:energy is not added or removed it just slows down. The flower remains a solid, but the liquid inside the flower freezes and becomes a solid rather than a liquid that is the only change of state.

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