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    susanguido's Avatar
    susanguido Posts: 11, Reputation: 1
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    #1

    Oct 16, 2015, 02:33 PM
    Principles of Thermodynamics
    A gas expands and does 82.7 J of work on the surroundings. At the same time, the gas loses 103 J of energy to the surroundings as heat. What is the change in the internal energy of the gas?
    would this be ΔE = q + w (-103) + (82.7) = -20.3. I get confused with the positive and negative charges.
    magprob's Avatar
    magprob Posts: 1,877, Reputation: 300
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    #2

    Oct 17, 2015, 09:18 PM
    Well to be honest, I've never considered the math concerning a fart before, but if you say so, well who am I to question you.
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