An ideal gas (Oxygen) at P1 and T1 is compressed in a piston cylinder assembly first isothermally to P2 and then isentropically to T3. Do not assume that the specific heats are constant. Determine the following given the properties listed below:
Given Values
m (kg) = 0.18
T1 (K) = 617
P1 (bar) = 1.54
P2 (bar) = 2.23
T3 (K) = 716
1. Determine the moles (kmol) of O2.
2. Determine the change in internal energy (kJ) from state 1 to state 2.
3. Determine the work (kJ) from state 1 to state 2.
4. Determine the heat transfer (kJ) from state 1 to state 2.
5. Determine the change in entropy (kJ/K) from state 1 to state 2.
6. Determine the pressure (bar) at state 3.
7. Determine the change in internal energy (kJ) from state 2 to state 3.
8. Determine the heat transfer (kJ) from state 2 to state 3.
9. Determine the work (kJ) from state 2 to state 3.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?