2-kg of air (ideal gas) undergoes a compression process from 120 kPa to 600 kPa at a constant temperature of 300 K. The boundary work in this process is kJ. 277 -277

Please solve fast and correct this is urgent for me

3-39 Water initially at 200 kPa and 300°C is contained in a piston-cylinder device fitted with stops. The water is allowed to cool at constant pressure until it exists as a saturated vapor and the piston rests on the stops. Then the water continues to cool until the pressure is 100 kPa. On the T-v diagram, sketch, with respect to the saturation lines, the process curves pass- 1stams! od on TURNACE ing through the initial, intermediate, and final states of the 1992 palam 11. water. Label the T, P, and U values for end states on the process artita ne odrow OFTİ 21 nucfortyd beinvarian curves. Find the overall change in internal energy between the 1610 PRICE initial and final states per unit mass of water. al state Onimals uliod Anub 1516w 3-150 3-160 In Water 200 kPa 300°C 3-17C ment rises. Now on top of air Obs will rise in a co FIGURE P3-39 180 Q

One kg of superheated steam is at 400 kPa and 400°C. Heat is added to raise the temperature to 500°C. Find the amount of heat needed (kJ) if: (a) The volume of the steam is kept constant during the heating. (b) The steam is allowed to expand during the heating (e.g., in a piston/cylinder system) such that the pressure is constant. Hint: The steam is not an ideal gas under these conditions.