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Homework Help: Help with calculating ΔE

  1. Feb 8, 2010 #1
    The problems asks,
    Calculate ΔE, and determine whether the process is endothermic or exothermic for the following cases:(A) A system absorbs 105 kJ of heat from its surroundings while doing 29 Kj of work on the surrounding;(B) q = 1.50 kJ and w = -657j; (C) the system releases 57.5 kJ of heat while doing 22.5 kJ of work on the surrounding.

    Im confused with the question, im pretty sure the equation is ΔE = q+pΔv

    im not sure what to do can anyone help me, thanks.
     
  2. jcsd
  3. Feb 9, 2010 #2
    It is easier than that.
    You have two values:
    - Absorbed heat. It is an amount of energy which goes into the system
    - Work done by the system. It is an amount of energy which goes out of the system.

    Now a system is exothermic if it releases more energy than it absorbs, and endothermic if the other way around.
     
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