A Freezer In A Room

[chemist]

Let's say you put a freezer inside a well insulated room. You turn it on, and open the freezer's door. After that you leave, and close the door to the room from the outside.

After a few hours you go back into the room, and now the question is:

Will the room be cooler or warmer than before you turned the freezer on? Or will the temperature be the same?

Cheers

[Mid]

I'm guessing warmer just from touching the exterior of my fridge .

Given that the freezer door is open the motor is running full-time .

Edited July 25, 2007 by Mid

[Neddy]

Let's say you put a freezer inside a well insulated room. You turn it on, and open the freezer's door. After that you leave, and close the door to the room from the outside.

After a few hours you go back into the room, and now the question is:

Will the room be cooler or warmer than before you turned the freezer on? Or will the temperature be the same?

Cheers

Depending on how long the room is unattended, the compressor in the freezer will burn itself out. In that scenario, the temperature probably will be the same provided the room is insulated enough so that it is not influenced by the ambient outside temperature.

[Soju]

Due to the law of conservation of energy, whereby the total amount of energy in an isolated system remains constant, if the room is well insulated enough (an isolated system), but you consume electrical energy obtained outside the isolated system, that electrical energy will be converted into additional heat and the room will heat up by that amount. That is assuming that the inside temperature of the freezer is the same as the room temperature at the start of the experiment.

Edited July 25, 2007 by Soju

[chemist]

Due to the law of conservation of energy, whereby the total amount of energy in an isolated system remains constant, if the room is well insulated enough (an isolated system), but you consume electrical energy obtained outside the isolated system, that electrical energy will be converted into additional heat and the room will heat up by that amount. That is assuming that the inside temperature of the freezer is the same as the room temperature at the start of the experiment.

As usual an excellent summary by Soju. The law of conservation of energy of course implies that the room will be warmer even in Neddy's scenario above, providing that the room is perfectly insulated.

Regards