An open test tube at 293 K is filled at the bottom with 12.1cm of Hg, and 5.6 cm of water is placed above the Hg.Calculate the absolute pressure at the bottom of the testtube if the atmospheric pressure is 756 mmHg. Use a densityof 13.55 g/cm3 for Hg and 0.998 g/cm3 for water. Give theanswer in terms of psia

Given that, The height of the mercury hm = 12.1 cm The height of water hw = 5.6 cm Atmospheric…

Answered: An open test tube at 293 K is filled at…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Q5/ The U tube contains two liquids in static equilibrium water of density pw= 998kg/m³ in the right arm, and oil of unknown density px is in the left arm. Measurement gives l=135mm and d= 12.3mm. What is the density of the oil? Oil d Water
The balance in our lab displays to the 0.001 g Given this data: Mass of empty weigh boat: 2.795 g Mass of weigh boat with solid product: 9.705 g How should the mass of the solid product be reported to show proper precision?
(b) The Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re = Dup/μ where D is pipe diameter, u is the fluid velocity, p is the fluid density, and is the fluid dynamic viscosity. When the value of the Reynolds number is less than 2300, the flow is laminar-that is, the fluid flows in smooth streamlines. For Reynolds numbers above 2300, the flow is turbulent, characterized by a great deal of agitation. Liquid ethylene glycol flows through a pipe with an inner diameter of 6,51 inches at an average velocity of 0.651 ft/s. At the fluid temperature of 20°C, the density of the liquid is 1.097 g/cm³ and the viscosity is 18.2 centipoise. Determine the value of the Reynolds number and whether the flow is laminar or turbulent.
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)
True or false: Osmotic pressure can be explained by the difference in fugacities
Suppose that exactly half of the annular volume between concentric, horizontal cylinders is filled with a liquid and half with a gas, as shown below on the left. When the inner cylinder is rotated at an angular velocity , it is found that one interface rises to a height H above the other. The gap between the cylinders is sufficiently thin (W<< R) that local Cartesian coordinates can be used, as shown on the right. (For clarity, the gap width is exaggerated on the left.) All of the following questions concern flow in the liquid, which is Newtonian with constant properties. g R+W Gas Ω Liquid R H y Enlargement of liquid-filled gap X W ΩR Fixed (a) Assuming steady, fully developed flow, determine Vx(y) in the liquid in terms of dp/dx. (At this point, dp/dx is unknown.) (b) Relate dIP/dx in the liquid to H. You can assume that the absolute pressure in the gas is nearly constant (P = Po) and that surface tension is negligible. (c) Calculate H. That is, relate H to the rotation rate (),…
In assignment 3 I gave you the following expression for the pressure drop for turbulent flow through a horizontal smooth pipe of constant diameter at the special condition to which the Blasius equations applies: 0.25 L 0.75 1.75 AP = 0.241. BONUS Derive this equation. μ D4.75
A rectangular block below of height L and horizontal cross-sectional area A floats at the interface between two immiscible liquids: Derive a formula for block density(ρb), in terms of the fluid densities ρ1 and ρ2, heights h0 and h1, and the cross-sectional area A. (Note, all variables may not appear in the final result).
Show complete solution.
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.
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
1. FA Newtonian fluid is flowing between two large parallel plates in the z direction. The top plate is moving in the positive z direction at a constant velocity Vo. The bottom plate is stationary. The velocity profile this flow is given by V(y) = V₁ (a) (b) (77) where 2H is the distance between the two plates. y is the vertical coordinate from the center plane, and is the velocity profile as a function of y. Draw a schematic of the flow system with the appropriate coordinate system. For plates with a total width W in the x-direction and length L in the z-direction, derive an expression for the volumetric flow rate Q through the plates.

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