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Homework Help: Energy with inflation of Balloon problem

  1. Oct 23, 2008 #1
    1. The problem statement, all variables and given/known data

    A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes from 4.00 x 106 L to 4.50 x 106 L by the addition of 1.3 x 108 J of energy as heat. Assuming that the balloon expands against a constant pressure of 1.0 atm, calculate delta E for the process.

    2. Relevant equations
    delta E = Efinal - Einitial
    delta E = q + w
    w = F x d

    Pressure (P), Volume (V), Internal energy (E) and Enthalpy (H)
    delta E = delta H +(- PdeltaV)
  2. jcsd
  3. Oct 24, 2008 #2


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    Science Advisor
    Homework Helper

    You need to display your work ... remember W = - P(deltaV).
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