Question

1.What is the volumetric flow rate of a solution with density 1.5
kg/m3 flowing at a velocity of 5 m/s and a mass flow rate of 500
g/min? What is the area of the pipe? If it is circular, what is the
radius?

2.Suppose that a river with a molar flow rate of 10000 mol/s
meets another, larger river flowing at 500000 m3/s at room
temperature. What is the mass flow rate of the river downstream of
the intersection if you assume steady state? Evaluate the
feasibility of the steady state assumption in this situation.

Answer #1

Xylene (C8H10, ρ = 704 kg/m3 ) is flowing in a pipe with a
diameter of 100 mm at a velocity of 2.2 m/s. (a) Calculate the
volumetric flow rate in m3 /s. (b) Calculate the mass flow rate in
kg/s. (c) Calculate the molar flow rate in mol/s. (d) The 100 mm
pipe is joined to two smaller pipes with diameters of 25 mm and 50
mm respectively. If the velocity of the n-Octane in the smaller
pipe is...

A horizontal pipe carries a smoothly flowing liquid of density
of 1330 kg/m3. At Locations 1 and 2 along the pipe, the diameters
are ?1=5.71 cm and ?2=2.33 cm, respectively. The flow speed at
Location 1 is 2.07 m/s . What is the pressure difference Δ? between
Location 2 and Location 1 (including its sign)? Ignore
viscosity.

1. What will happen to the volumetric flowrate (m3/s) when water
flows from small diamiter pipe to larger diamiter pipe? Why?
2. What will happen to the water velocity (m/s) when water flows
from small diamiter pipe to larger diamiter pipe? Why?
3. Why is the presure reading on the small diamiter pipe
different to that of the larger diamiter pipe?

Methane is flowing in a pipeline at a target rate of 20.7 m3/min
at 30°C and 250 kPa. To check the flow rate, He is introduced at
25°C and 300 kPa. How many cubic centimeters per minute of He must
be added if the minimum detectable concentration of He downstream
of the injection point is 10 ppm?
I dont understand what "minimum detectable concentration of He
downstream of the injection point" means?

Liquid benzene (C6H6) flows through a pipe with a mass flow rate
of 71.0 g/s. Given that the density of benzene is 0.8765 g/cm3,
find:
a.) The molar flow rate in
mol/min:
b.) The volumetric flow rate in
L/hr:

One method to determine the flow rate of a turbulently flowing
stream is to inject a small, metered amount of some easily
dispersed fluid and then to measure the concentration of this fluid
in a sample of the mixed stream withdrawn a suitable distance
downstream. In pharmaceutical plants, there are often many inert
gas streams (i.e., streams that contain mostly nonreacting gases).
In a particular plant, there is a process stream that is composed
of 95mol% N2(inert) and 5 mol%...

An oil stream flowing at a rate of 60 m3 /h (?oil = 952.9 kg/m3
), at temperature of 10°C is to be heated to 175°C+/-0.5°C in a
heat exchanger using high pressure saturated steam. (a) With the
aid of the steam tables appended to this paper determine the
minimum pressure required of a saturated steam stream to achieve
this result? [5%] (b) If the actual temperature of the condensing
steam is to be 15°C?0.5°C above the minimum what is...

Consider a 20 * 105 m3 lake fed by a
polluted stream having a flow rate of 4.2 m3/s and
pollutant concentration equal to 25 mg/L. There is also a sewage
outfall that discharges 0.5 m3/s of wastewater having a
pollutant concentration of 275 mg/L. The stream and sewage wastes
have a second order decay rate of 0.32/day. Assuming the pollutant
is completely mixed in the lake and assuming no evaporation or
other water losses or gains, find the steady-state...

1) A nozzle is a device for increasing the velocity of a
steadily flowing stream of fluid. At the inlet to a certain nozzle
the enthalpy of the fluid is 3025 kJ/kg and the velocity is 60 m/s.
At the exit from the nozzle the enthalpy is 2790 kJ/kg. The nozzle
is horizontal and there is negligible heat loss from
it.
(i) Find the velocity at the nozzle exit.
(ii) If the inlet area is 0.1 m2 and specific volume...

Air at 1 bar, 295 K, and a mass flow rate of 0.7 kg/s enters a
compressor operating at steady state and exits at 3 bar. During the
compressing from inlet to exit, the air experiences a polytropic
process as PV^n=constant. m=6, n=1.48.
(1) Determine the power required by the compressor.
(2) Determine the heat transfer between the compressor and the
surrounding.
(s) Determine the rate of exergy destruction. Kinetic and potential
energy effects are negligible. Let T_0 = 300...

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