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Chemical Engineering
Chemical Engineering is the branch of engineering that deals with the technology of large-scale chemical production and the manufacture of products through chemical processes. Today, the field of chemical engineering is a diverse one, covering areas from biotechnology and nanotechnology to mineral processing.
1,464 Questions
What is PF in chemical reaction engineering?
The plug flow reactor model (PFR, sometimes called continuous tubular reactor, CTR) is normally the name given to a model used in chemical engineering to describe chemical reactions in continuous, flowing systems of cylindrical geometry.
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What happens to air when after repeated compression and expansion?
After repeated compression and expansion, air will experience temperature changes due to the compression and expansion processes. This can lead to the air losing some of its energy as heat, resulting in a decrease in temperature. Additionally, the repeated compression and expansion can also lead to some loss of air pressure over time.
What is the difference between Ziegler Natta and metallocene catalyst?
Ziegler-Natta catalysts are heterogeneous catalysts composed of transition metals and organometallic compounds, while metallocene catalysts are homogeneous catalysts consisting of a single transition metal atom sandwiched between two cyclopentadienyl ligands. Metallocene catalysts are more precise and produce polymers with narrower molecular weight distribution compared to Ziegler-Natta catalysts.
If you have a car made to use Dexron ATF, it is. (The other kind is Type F, which goes in old Fords, old Saabs and probably a couple other makes I don't know about.)
Dexron isn't a brand of ATF. It's the name GM gave to ATF meeting its specifications, so a lot of oil companies make it.
What is the importance of carbon residue test?
The carbon residue test is important in determining the amount of carbonaceous material present in a petroleum product. It can provide insight into the combustion characteristics and potential for carbon build-up during use. This information is valuable for assessing the fuel's quality and performance in various applications.
If you know the temperature, pressure and volume of the vessel, you can calculate the amount of moles through the Ideal gas law.
PV = nRT
That is assuming you have ideal conditions. If not, a variance of the ideal gas law can be used in order to get the moles of your gas.
What is the application area of chemical engineering?
Hey buddy,
m not a chemical engineer but one of my frnd is... N according to him chemical engineers can go into any field respective to chemicals especially to the petroleum refinery industry.
Hope my answer helpd u... :-)
What do you understand with hot spot in tubular reactor give example?
Hot spot: where there is no heat transfer take place, so temperature of that spot or place is increased and it is greater that that of bulk temperature of system.
In tubular reactor mixing is many times poor. because of boundary layer. the liq at tube wall has lowest energy, so heat transfer is bad at that spot.
What was the last element discovered?
Francium (Atomic Number 87), the Last Discovered Natural Element
What happens when you mix two polyatomic compounds in one formula?
What happens when you mix two polyatomic Compounds?
For example:
1. Ammonium + Carbonate = (NH4)2(CO3)
This is correct
or
2. Ammonium + Carbonate = NH4 2CO3
This is not correct
The general rule is that we would only put brackets around a poly atomic if we have more than one of them in our compound.
So (NH4)2CO3 would be how it should've been shown as.
Although the first example is still correct and usable as an answer.
How can liquid-liquid extraction can be improved?
Liquid-liquid extraction can be improved by optimizing the choice of solvents to improve selectivity and efficiency, controlling the pH to enhance extraction efficiency, using proper agitation techniques to maximize mass transfer between the phases, and implementing extraction cells or devices to increase process automation and reduce variability.
What is the density of carbon tetrachloride at 26 degrees celsius?
The density of carbon tetrachloride at 26 degrees Celsius is approximately 1.595 grams per cubic centimeter.
What is the ratio of silicone 1000 cps and isopar-l for the preparation of tireblack?
The ratio of silicone 1000 cps to isopar-L for tireblack preparation can vary depending on the desired viscosity and properties. A common starting point could be 1 part silicone 1000 cps to 3-4 parts isopar-L. However, it's recommended to conduct small-scale experiments to find the ideal ratio for your specific formulation.
What is the definition of mass-transfer binary?
A mass-transfer binary is a type of binary star system where one star transfers mass onto its companion due to their close proximity. This transfer of mass can occur through processes such as stellar winds or Roche-lobe overflow. The mass transfer affects the evolution and properties of both stars in the system.
What determines the burn rate of different type of candles?
The burn rate of a candle is influenced by factors such as the type of wax used (e.g., paraffin, soy, beeswax), the size and composition of the wick, the presence of additives or fragrances, and external conditions like airflow and temperature. In general, softer waxes tend to burn faster than harder waxes, and a larger wick or candle diameter may lead to a faster burn rate.
Quiescent liquid refers to a liquid that is still or motionless, typically not vibrating or moving. This state is often used to describe liquids in a calm or undisturbed state, without any external influences causing agitation or flow.
What experimentsssssssssssssssssahdueigfep did Mendel conduct and what were his results?
Mendel conducted experiments crossing pea plants with different traits, such as tall and short plants, and smooth and wrinkled peas. He observed that certain traits appeared in predictable ratios in the offspring, leading him to formulate the principles of inheritance, now known as Mendelian genetics.
When the reactants get colder in an endothermic reaction what has happened to the heat energy?
Endothermic reaction means reactions which absorbs heat energy to carry out reaction. So if the reactants are at colder condition, process/operation require much more heat energy,ie, heat energy consumption will be more.
Does all glass ring like crystal?
If you mean by moving your finger on the outside of a cup, then no. Only crystal glasses do that. That is false. We just experimented with all kinds of glasses, some where crystal and many were not and we were able to make all of them ring.
You can determine the vapor velocity in a packed batch distillation column by conducting experimental trials with different cooling water flow rates and heater voltages to change the temperature. Measure the vapor flow rate at the top of the column while varying these parameters and use the ideal gas law to calculate the velocity based on the vapor density and column cross-sectional area. Ensure to account for the composition changes that result from different operational conditions.
Why Natural Gas and Steam Reforming reaction is endothermic?
I assume this is the reaction you are talking about:
CH4 + H2O (g) --> CO(g) + 3H2(g)
From thermodynamics you can approximate the standard heat of reaction Hrxn with Hess' Law. This is the sum of the heats of formations of the products minus the sum of the heats of formations of the reactants in their stoichemtric ratios.
Hrxn = SUM [(3)*Hf (H2)+(1)*Hf(CO)] - SUM [(1)*Hf (CH4) + (1)*Hf(H2O (g))]
Looking up these values in a Chemical Engineering Handbook or textbook we can substitue and find the heat of reaction.
Hrxn = SUM [(3)*(0 kJ/mol) + (1)*(-110.52 kJ/mol)] - SUM [(1)*(-74.85 kJ/mol) +
(1)*(-241.83 kJ/mol)]
= -110.52 - (-316.68) kJ/mol
= + 206.16 kJ/mol, therefore the reaction is endothermic
Remember standard heats of formation of elements, as hydrogen in this case, are zero.
What are the uses of chemistry in sugar industry?
Chemistry is used in the sugar industry for various processes such as the extraction of sugar from sugarcane or sugar beets, purification of sugar through crystallization techniques, and the production of byproducts like molasses. Additionally, chemistry is essential in controlling the quality of sugar products, determining sugar content using analytical techniques, and ensuring compliance with food safety regulations.
Which force must be overcome to melt Krypton?
To melt Krypton, you would need to overcome the intermolecular forces between Krypton atoms. These forces are relatively weak compared to the covalent or metallic bonds found in molecules and solid structures.
Why dew point is not equal to bubble point in mixture of liquids?
Dew point and bubble point represent different phases of a mixture. Dew point is when the vapor starts to condense into liquid, while bubble point is when the liquid starts to vaporize into vapor. In a mixture of liquids, the components will have different boiling points, causing the dew point and bubble point to occur at different temperatures.
How is recrystallization temperature related to the grain size?
The recrystallization temperature is the temperature at which new strain-free grains begin to form in a deformed material. In general, materials with smaller grain sizes have lower recrystallization temperatures because there are more grain boundaries present, which promote the nucleation of new grains during recrystallization. Conversely, materials with larger grain sizes may require higher temperatures for recrystallization to occur due to fewer grain boundaries inhibiting grain growth.
