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Homework Help: Adiabatic process

  1. Jun 16, 2010 #1
    1. The problem statement, all variables and given/known data

    Is this impossible: (yes or no)

    During an adiabatic process, 37 J of work was done on the system.

    2. Relevant equations

    Delta U=-W

    3. The attempt at a solution

    I think it is impossible because it says work is negative. I am not sure though.
  2. jcsd
  3. Jun 16, 2010 #2


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    Where does "it" say that? Do you think that the work done on the gas during an adiabatic process should always be positive?
  4. Jun 16, 2010 #3

    Andrew Mason

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    Explain your reasoning. If positive 37 Joules of work is done ON the system then the work done BY the system is -37 Joules. This means [itex]\Delta W = -37J[/itex]. You correctly state that [itex]\Delta U = -\Delta W[/itex] if [itex]\Delta Q = 0[/itex] (no heat flows into or out of the system). So what must be the change in internal energy here? Why can this not occur?

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