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Questions tagged [chemistry]

For engineering questions involving chemistry. For pure chemistry problems, please visit our sister site Chemistry Stack Exchange.

For engineering questions involving chemistry. For pure chemistry problems, please visit our sister site Chemistry Stack Exchange.

57 questions
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Nylon brittleness as function of moisture content

Can someone explain the how/why Nylons brittleness is to some degree a function of it's moisture content. I don't understand HOW the water content changes the elongation at break of the material. Water doesn't bond or change the chemistry of the…
Diesel
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Am I a chemist or a chemical engineer?

I apologise if this is the wrong place to ask. I tried asking on reddit but so far I didn't get a lot of answers/ It seems that in America these two degrees are considered separate. Not so much here in Russia. By American standards would I be…
Iam Cleaver
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How would you calculate the sedimentation rate of a coarse chemical suspension under gravity using a centrifuge?

If the sedimentation rate can be determined for a coarse chemical suspension or a suspension containing large particles (i.e., particles with radii between 100 to 200μm) in a medium like vegetable oil, Can they also be determined if a centrifuge was…
Adrian . EXE
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Help with Mass Flow Rate

I'm a beginner in chemical engineering so apologies in advance if this question is very basic! The Problem You are required to measure the mass and volumetric flow rate of a slurry stream. The slurry contains only water and solids. You take a bucket…
air_nomad
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Why does aluminum clad steel wire have high corrosion resistance?

Why do aluminum clad steel wires have high corrosion resistance despite being two dissimilar metals? Does the aluminum act as a protective & sacrificial layer similar to zinc in galvanization or is there some other mechanism going on?
Fred I.
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Calculate the specific surface area of a mesoporous sample

I'm a nanoengineering student who's been stuck on the following problem for a few days. I've gone back over my professors slides, watched podcasts from an old professor, etc. etc., but don't understand it any more than I did when it first came up.…
TobyTobyo
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Chemical engineering calculations - basis

You have a gas of the following compositions : 40% N2, 30% CO2, 30%,CH4 in a tank . What is the Average Molecular Weight of the gas if your compositions is based on molar ? I found that the AMR with basis set at $100$kg-Mol = $29.2$kg/kg-mol As Im…
user307640
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Solar distillation of sump pump water and the issue of Radon gas

Lately I have been thinking about designing and building a solar-powered water distiller that would be placed close to my house in my backyard. One thought that I have is installing a bypass valve on the pipe coming up from my sump pump so I can…
user57467
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Why don't we light the methane escaping from the NordStream pipeline?

The methane escaping from the NordStream pipeline for a few days now has a much more potent greenhouse effect than carbon dioxide. Burning methane gives us CO2. The pipe won't be repaired before all the gas escapes, and when it does, salt water will…
Akita
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Reactor tube material at moderately high temps (600-1000 C) with water vapor as primary constituent of flow

I work with a type of spectrometer (made by Picarro) that uses near-infrared lasers to measure the stable isotopic composition of water vapor. The samples measured are typically liquid water samples that are vaporized at 110 °C and then carried by a…
Jack Hutchings
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Fastest possible mean (peak?) piston speed on a Diesel engine

On a Diesel engine running distillate fuel (the kind you run in cars, SUV's, trucks, trains, boats, and smaller ships), what are the theoretical and practical limits to maximum mean piston speed you can achieve in an engine? On the low end, you have…
El Ectric
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Heat Transfer in a tubular reactor with constant jacket temperature - impossible solution?

I have received from my professor the following problem: A first-order exothermic reaction A -> B takes place in a tubular reactor (typical PFR). The tube is cooled to a constant wall temperature $T_w$ and the total amount of heat removed from the…
J Faller
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CO2 production from sugar

Greenhouses often use burners for CO2 enrichment, which requires a source of liquid propane or natural gas. The yeast fermentation process can also be used to create CO2 for a greenhouse by supplying water, sugar and yeast. The fermentation process…
Sebastian Goodman
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Method of separating oxygen from a mixture of oxygen + carbon monoxide

I have a 99,9% oxygen, with 0,1% is CO. Is it possible to separate the CO from oxygen in this mixture? The closer the percentage to 0 for CO, the better. I've read about separation of oxygen from air, which involves liquifying them and conduct a…
el-cheapo
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In case of solvation , Who converts gaseous ions to aqueous ? Why do we even have gaseous but not solid ions?

We take Nacl and dissolve it in water. There is formation of $Na^+$ and $Cl^-$ gaseous ions along with 2H+ and $Cl^{2-}$ aqueous ions. Then , Na+ is attracted towards $Cl^{2-}$ and 2H+ is attracted towards $Cl^-$ ions. Energy required by water…
S.M.T
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