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Math Help - fancy entropy exercise?help needed

  1. #1
    marikas
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    fancy entropy exercise?help needed

    3. The entropy change, ΔS, associated with the isothermal (i.e.
    constant temperature) change in volume of n moles of an ideal
    gas from volume V1 to volume V2 is given by the equation
    ΔS = nR ln(V2/V1)
    where R is the gas constant.
    (a) If a compression occurs (V2 < V1) use Equation 1 to deduce
    whether there will there be an increase ( ΔS is positive) or
    decrease ( ΔS is negative) in the entropy of the gas.
    Section 2: Coursework 12
    (b) If an expansion occurs (V2 > V1) use Equation 1 to deduce
    whether there will there be an increase or decrease in the
    entropy of the gas.
    (c) The ideal gas law states that pV = nRT, where p is the
    pressure of the gas. Use this expression and Equation 1 to
    obtain an equation relating the entropy change to the initial
    and final pressures (p1 and p2). (Note that n,R and T will
    be constant at the two different pressures).
    Last edited by marikas; October 27th 2007 at 05:19 AM. Reason: wrong font
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  2. #2
    Super Member

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    Hello, marikas!

    Who told you to format like this?


    [COLOR=black ][ /COLOR ] [COLOR=black ][/COLOR ]
    What was that for? .black-On, black-OFF ?

    [FONT=Times New Roman ][COLOR=black ][FONT=CMR10 ]
    Why declare a font if you're going to change it before you use it?

    3. The entropy change, [/FONT ] [/COLOR ][COLOR=black ]Δ[/COLOR ][COLOR=black ][FONT=CMMI10 ]S[/FONT ][/COLOR ]
    Once you declare "[COLOR=black ]" it stays in black until you change it.
    You don't have to do black-ON, black-OFF for every font-change.
    If you want italics, don't change fonts.
    . . Just use \text{[i]} and [/\text{i}]

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