No credit will be given for just the numerical answer with no work shown. All answers must be given to the correct number of significant figures and with the appropriate units on them. Assume all gases are perfect unless otherwise stated in the problem. When a certain freon used in refrigeration was expanded adiabatically from an initial pressure of 32.00 atm and 0 C to a final pressure of 1.00 atm, the temperature fell by 22.0 K. Calculate the Joule-Thomson coefficient, m JT , for the gas at 0 C assuming it remains constant over this temperature range. For a van der Waals gas, .
D U is positive, negative, or zero.
State a reason for your answer. Adiabatic expansion of a nonideal gas into vacuum. A perfect gas undergoes an expansion process at constant pressure. Explain your answer. Calculate the pressure that must be applied to copper at 293 K in order to increase its density by 0.0800 percent.