thermodynamics 1. chapter 1

Problem 1 ( 10 points): A rigid cylinder contains water vapor at 10 bar and 200C. The total volume of the cylinder is 0.1m3. The cylinder is emptied by opening a valve and letting pressure drop to 0.1bar. The operation is performed isothermally. Determine the mass of water vapor to be removed and the amount of heat transferred to the tank for each of the following cases. (i). Assume that the water vapor is an ideal gas. Use the specific heat relation for water vapor in Appendix E of the textbook. (ii). Use only the steam tables given in Appendix E. Briefly comment on reasons for differences or similarities when compared to the values found assuming an ideal gas