# Just A Couple Of Thermodynamics Questions Help Please!

1. Jan 20, 2010

### mmmboh

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!