Alf and Arlo were in the kitchen, and Mother was out.

It was stifflingly hot, and Alf said, "It's too hot. I'm going to open the deepfreeze to cool us down a bit."
Arlo, his younger brother, said:"Yeah, good idea! But switch it off."
"There you are, Arlo," said Alf, "You admit that you were wrong when I opened the fridge door to cool us, and you said it would make us hotter."
Arlo replied, "No, I was right then, and I'm right now!"

Is Arlo right? Provide valid arguments for your answer.

Fridges and freezers move heat from thier inside to the room outside.  Leaving the door open will make the unit try to move heat from the entire room - to the room!  Since no such device is 100% efficient,  you will heat the room.  Turning the unit off with the door open will allow the already existing cold air, as well as all the cold parts inside the unit, to come to equilibrium temperature with thr rest of the room  so the room will cool somewhat. 

Posted by Kenny M on 2022-08-22 07:57:21