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Heating and Cooling

  1. Mar 17, 2010 #1
    Why is it that when you heat an object, it takes longer compared to cooling it?
  2. jcsd
  3. Mar 17, 2010 #2
    The rate of heating/cooling depends upon the heat mechanisms operating and numerous factors related to the object itself and the surrounding it interacts with so are you sure?Perhaps you could be more specific.
  4. Mar 17, 2010 #3
    Hmm ...
    Well let's say you have two of the same objects ... if you heat one, and cool the other for 2 minutes exactly... put the temperature of the heated object in ratio to the temperature of the colder object...

    The colder object is more cold in ratio than it is hot.
  5. Mar 17, 2010 #4
    Lets use your example as a thought experiment.Let the two objects have different starting temperatures but apart from that be identical in all respects.Let them be in some sort of thermal contact but completely isolated from the surroundings.If the heat lost by the hot object is gained by the cold object(in other words heating one and cooling the other)then after two minutes the temperature loss of the hot object would equal the temperature gain of the cold object.The situation in real experiments will be far more complex and the outcome depends on several variables.It can make the brain ache just to think about it:eek:
    Last edited: Mar 17, 2010
  6. Mar 17, 2010 #5
    Yeah, I see what you mean ...

    Just typing out the hypothetical situation in my previous post took me a whole 10 minutes trying to word it correctly. >_>
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