Thread: Pistons

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    Pistons

    A piston expands against 1.00atm of pressure, from 11.2L to 29.1L. This is done without any transfer of heat.

    • a) calculate the change in energy of the system
    • b) calculate the change in energy for the above change, and in addition, the system absorbs 1,037J of heat from its surroundings


    ME AYUDA POR FAVOR.

    Just kidding! I figured it out. If anybody needs it:


    part 1)
    ΔE = -PΔV
    ΔE = -1atm(29.1L - 11.2L)
    ΔE = -17.9 Liters(atm)
    -17.9 Liters(atm) x 101.3 Liters(atm) / 1J = 1.813kJ

    part 2)
    1.813kJ + 1.037kJ = 2.85kJ
    Last edited by KABLE; 10-30-2011 at 11:11 PM.

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