Describe why mixtures of liquids and gases, even of the same substance, are NOT ideal gases. Describe which assumptions this mixture violates and draw plots comparing the behavior of these gases on P-v and T-v plots to support your argument. Water in a piston-cylinder system undergoes an isobaric heat addition process. It starts as a saturated liquid at 438.1 K (state 1) and then heat is added. Make sure to indicate the table you used for each of the questions below. What is the enthalpy at state 1? What is the enthalpy when the water reaches a saturated vapor state? What is the enthalpy when the water reaches 700 K? What is the phase?

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.