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Homework Help: Just A Couple Of Thermodynamics Questions Help Please!

  1. Jan 20, 2010 #1
    Please help! I have an assignment due tomorrow, and there are two parts of questions that I cannot get :S

    1. The problem statement, all variables and given/known data
    A substance has an isothermal compressibility of k=-a/v and an expansivity B=2BT/v, where "a" and 'b" are constants. The equation of state is v-bT2+aP=constant (I found this equation)...If at a pressure P0, and temperature T0, the specific volume is V0, evaluate the constant.

    2.We have a graph of compressibility and expansivity of copper as functions of temperature at a constant pressure of 1 atm, and the question asks to find the expansivity of copper at 1000 K and 1 atm, and compute the fractional change in volume of the copper when the pressure is isothermally increased to 1000 atm. Assume dB/dT is independent of pressure.



    3. The attempt at a solution

    I have tried so many thing and I can't figure out what to do! Can someone PLEASE help??

    Thank you!
     
  2. jcsd
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