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Air (ideal and perfect gas) with mass of 8.000kg is heated at constant pressure of 9.000mbar (gage) from -20.810C to 179.148C. Determine the heat required in MJ, and the change of the system volume (ΔV= V2-V1).
Evaluate the volume occupied by 7.000 kg of air at a gage ressure of 623 kPa and a temperature of 686 C. Calculate air density undet the same conditions.
Air (ideal gas) with mass of 12kg expands polytropically ( n=1.11) in a closed system from 515 C to 10 C . Find the work and the heat exhanged with the surroundings.
how many mols of HCl are required to fully react with 150 g of C to ( A H )2​ ?
Good morning. I have a question about gas flow.
Assuming that there are two different systems 1 and 2, system 1 and 2 interact through a small hole. If system 2 pressure is higher, we ask if there is a hydrodynamic formula or other scientific formula that explains how the gas flow is in the hole.
[For example, the flow of gas when a small hole is formed in a sealed bag containing air]
※ The gas in system 1 and 2 is air.
Examine the following double pipe heat exchanger. Water flowing at 5000 kg/hr is to be heated from 20 C to 35 C by using hot water from another source at 100 C. If the temperature drop of the hot water is not to exceed 15 C, how much tube length is needed in a parallel flow arrangement if a nominal 3 inch outer pipe and nominal 2 inch inner pipe are used. Assume teh inner pipe wall thickness is 1/8 inch carbon steel with thermal conductivity k = 54 W/mK. If the heat exchanger is to be composed of 1.25 m U-tubes connected in series, how many will be required. Also, determine the pressure drop for each fluid stream. The heat exchanger is insulated to prevent losses, and the hot water flows in the in the annulus while the cold water which is to be heated flows in the in inner pipe.
Steam with 80% quality is being used to heat a 40% total
solids tomato purée as it fl ows through a steam injection
heater at a rate of 400 kg/h. The steam is generated at
169.06 kPa and is fl owing to the heater at a rate of 50 kg/h. If
the specifi c heat of the product is 3.2 kJ/(kg K), determine the
temperature of the product leaving the heater when the initial
temperature is 50°C. Determine the total solids content of the
product after heating. Assume the specifi c heat of the heated
purée is 3.5 kJ/(kg°C).
A gas feed stream containing 4.03 mole % methane and balance O2 is mixed with a pure
stream of O2. The final stream composition is 2.05 mole % methane. Determine the amount
of O2 needed to dilute the feed stream.
Hint: Assuming a basis may be helpful
In the selective oxidation of isobutylene to dimethyl ketone using a MoO3/U308/SiO2 catalyst it is thought that each reactant utilizes different catalytic sites. The reaction rate is controlled by surface reaction between the two adsorbed species. Postulate a sequence of elementary steps and derive the LH rate equation; sketch the rate versus pressure of isobutylene curve assuming the 0 2 pressure is large. Compare this plot to the case where both reactants compete for the same sites.
An isothermal reversible reaction (A ↔ B) is carried out in an aqueous solution. The reaction is first-order in both directions. The forward rate constant is 1 h–1 and the equilibrium constant is 1. The feed to the plant contains 100 kg-mol/m3 of A and enters at the rate of 120 m3/h. The reactor is a stirred tank of volume 180 m3. The exit stream then goes to a separator, where the concentration of A (CA) is doubled and 30 m3/h is sent back to the CSTR in a continuous operation.
a. Find the conversion.
b. Compare this conversion with what you will get if there is no recycle.
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