Q3) The cylindrical tank with hemispherical ends shown in Fig. below contains a volatile liquid and its vapor. The liquid density is 800 kg/m', and its vapor density is negligible. The pressure in the vapour is 120 kPa (abs), and the atmospheric pressure is 101 kPa (abs). Determine: (a) the gage pressure reading on the pressure gage; and (b) the height, h, of the mercury manometer. Vapor Liquid Mercury

5. Solar ponds are small artificial lakes used to store solar energy. The rise of heated (and thus less dense) water to the surface is prevented by adding salt at the pond bottom. In a typical salt gradient solar pond, the density of water increases in the gradient zone, as shown. For H 4 m, po 1040 kg/m³, and a thickness of 0.8 m for the surface zone, calculate the gauge pressure at the bottom of the gradient zone. V S Sun = = H=4m = Surface zone Po 1040 kg/m³ Increasing salinity and density Gradient zone Storage zone - (2 Po=1040 kg/m P= Po(1+35+5²)

B) A mercury thermometer having a time constant of (90 sec) is initially at (300°C). It is immersed in a bath maintained at (130°C) at t = 0. Determine the temperature reading at (t=3 min) and (t = 5 min).

A tank of gas connected to a manometer is shown below. The manometer is a U-shaped glass tube open to the atmosphere at one end and containing water. From the elevations shown, calculate the gauge pressure in the vessel. 2 ft Gas lbm p = 0.1- ft3 1 ft 0.5 ft

This problem is (6.30) from a book  "Thermodynamics and Statistical Mechanics An Integrated Approach by M. Scott Shell"

HOMEWORK-2 Considering the steady-state laminar flow of a liquid with density p and viscosity p in a vertical tube of length L and radius R; a) Show the momentum flux and velocity profile in the figure. b) Determine the momentum flux distribution, the velocity distribution, the maximum velocity (Vzmax), and the average velocity (Vzaverage) expressions. PL L R ! Po 1111111 Flow in

4. A mass of 1.7 kg of saturated liquid water is completely vaporized at a constant pressure of 101.325 kPa. Determine (a) the volume change and (b) the amount of energy transferred to the water.

A 7 dm3 rigid tank contains 4.5 kg of saturated water (liquid and vapor) at 38ºC. The tank is slowly heated. a. After a long period of time what do you think happened to the liquid water surface: do you think it raised and reached the top of the tank or it dropped and reached the bottom of it? b. Solve the same problem considering that the amount of water is 0.45 kg instead.

chemical engineering A power plant emits 216 g of SO2 every hour. The wind recorded on the same day is 5 m s-1, and the atmospheric stability class is A for the clear summer afternoon. There is no plume rise, and the stack height is 30 m. The values of σy and σz are 215 m and 450 m, respectively. Determine: the concentration of SO2 0.7 km downwind along the plume centreline at ground level.

Air is contained in a vertical piston–cylinder assembly fitted with an electrical resistor. The atmosphere exerts a pressure of 101.325 kPa on the top of the piston, which has a mass of 50 kg and a face area of 0.10 m 2 . Electric current passes through the resistor, and the volume of the air slowly increases by 2 ft3 while its pressure remains constant. The mass of the air is 0.32 kg, and its specific internal energy increases by 20 Btu/lb. The air and piston are at rest initially and finally. The piston–cylinder material is a ceramic composite and thus a good insulator. Friction between the piston and cylinder wall can be ignored, and the local acceleration of gravity is g = 32.0 ft/s2 Determine the heat transfer from the resistor to the air, in Btu, for a system consisting of (a) the air alone, (b) the air and the piston. Also draw the schematic diagram. Hint: Refer to example