The door of a refrigerator is opened. Now the temperature of the room will
a. remain same
b. decrease in summer and increase in winter
c. decrease
d. increase

Question

anonymous · Answer

d. increase

anonymous · Answer

temperature of the room will initially decrease as the cold air and the room air mix... but of course then the refrigerator motor cuts on and since the motor is less than 100% efficient, it will cause the room to heat more than than it is able to cool it... you'll need to argue this answer with the questioner I'm sure since it's not well defined

anonymous · Answer

sounds like a Dr. Paul Hewitt question from conceptual physics
reference the book or class level can help the audience (sp?)

anonymous · Answer

In theory, a refrigerator uses an engine to transport heat away from the inside of the refrigerator. That is why you always feel a warm wind from the back. In theory, the opening of the door should equalize the temperature differences, leaving the temperature of the room unchanged.

anonymous · Answer

in a closed system rudolf clausius' second law of thermodynamics may be applicable here, and as sinthius stated, the average temperature should tend to that of an unchanged entropic state.

anonymous · Answer

What closed system? Are you not using electricity to run the motor/compressor? Where does the heat removed from the air go? Seems like back into the room to me......

bhumika · Answer

the temp.will inc. as it does not depend what the outer temp.is. concept is that compressor always give heat to surrounding you can notice refrigerator is always hot from back.but when door are closed it can not give heat it takes heat but when door open then it will give heat

anonymous · Answer

So basically the first the temperature will decrease because the cool air will enter. But then the difference in temperatures of the hot and cold regions will be smaller, compressor will have to do more work, eject more heat out and so the temperature will increase?

anonymous · Answer

yes, room temperature will increase, but more slowly than if the door had been closed

matthewrlee · Answer

Is the refrigerator on? How big is the room? How big is the refrigerator? How long will the refrigerator door remain open? Is the room closed? What type of heating and cooling system is maintaining the air temperature in the room? What is the setting and timing of the system? Poorly written question.  I'm sad for you that you're in this class.