The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is, less or more? Can any one help me out with an explanation...

Nandita Baral

• Mar 20th, 2017

The COP of a Refrigerator/AC would be given by expression: COP = (Cooling Effect/Power Input). The cooling effect produced by a refrigerator is obviously more for a refrigerator. At the same time th...

sunny vanza

• Feb 21st, 2016

It is less.

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How we can find specific heat, enthalpy, minimum ignition Energy and other thermodynamics properties of a new compound in pharma manufacturing industry.

Rushikesh urane

• Jul 18th, 2018

There are many calculation for thermodynamics .......like specific heat=s=q/m*dT

ashish mishra

• Sep 7th, 2016

There are many methods available for calculation of thermodynamic properties. Use chemical properties handbook by Yaws.

like heat capacity : cp=A+Bt+ct^2 +Dt^3
Where ABCD are different values for different compound.

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What is the Density of Steel?

Akash

• Apr 26th, 2018

Mass divided volume is for density

Anietie Udoh

• Jun 30th, 2017

8.05g/cm3 or 8050kg/m3

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What is the difference between coagulation and flocculation?

Ankit Yadav

• Oct 18th, 2017

Coagulation is the chemical process for separation of Effluent from water by adding some coagulants like aluminum sulfate aluminum chloride. when flocculation is a physical operation of removing eff...

Anietie Udoh

• Jun 30th, 2017

Coagulation is purely a chemical process in which the coagulant, often a salt, (e.g Alum) breaks down to release charges which induces the settling of the particles of a suspension while Flocculation is a physical process. The flocculant is often a polymer which induces the settling of particles.

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Why Stainless Steel is not corrosive?

Dibyendu Mandal

• May 18th, 2018

Stainless Steel contains cr.

Nijal Shah

• May 2nd, 2018

Stainless steel contains some percentage of chromium. Chromium reacts with oxygen to form Cr2O and thus prevents further oxidation of iron to form rust, so SS is noncorrosive

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What is the important properties of biodegradable plastics?
Which properties helps plastics to resist water?

VIVEK32043

 Profile Answers by VIVEK32043 Questions by VIVEK32043

• Jan 25th, 2017

Biodegradable polymers are those which are decomposed after their useful service life to end products like minerals, oxygen, etc. with the help of micro organisms under normal environmental conditions.

Khalid Ibrahim Jamadar

• May 24th, 2016

Biodegradable polymers, have extremely strong carbon backbones that are difficult to break, such that degradation often starts from the end-groups. Since the degradation begins at the end, a high surf...

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What is the role of software in process equipment design and what software should one refer to while dealing with related problems?

Aakash

• Sep 17th, 2017

Software are necessary because they are used in simulation of a process for example to find out the composition of distillate and bottom product of distillation column and we can also vary the number ...

Sandeep cheekati

• Mar 14th, 2016

We can use Dynochem, Visimix, Aspen plus

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What is the effect of pressure in the Distillation Operation? It is also said that when the vapor pressure of the liquid component equals the atmospheric pressure, boiling occurs; can anyone give me an example for this type of Distillation?Thank you

Sina Salimi

• May 30th, 2016

Increasing pressure makes separation harder, because it decreases relative volatility

rohit

• Sep 3rd, 2011

If we increase the pressure, the no. of stages in a distillation column becomes less as the liquid boils earlier (boiling occurs when the atmospheric pressure becomes equal to the vapour pressure of the liquid.)

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What is difference between micro-organisms & micro pollutants?

omenli collins

• Oct 13th, 2016

Micro-organism exists internally and can be destroyed at high temperature. It performs multiple functions, it can cause harmful diseases but can also help to enrich the soil. It is a living thing. M...

Khalid I Jamadar

• Jun 1st, 2016

A microorganism or microbe is an organism which is too small to be seen by the unaided human eye. They are microscopic. The study of microorganisms is called microbiology. Microorganisms include bacteria, fungi, archaea or protists and viruses.

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What is the difference between composite and alloy metals ?

Lovy

• Aug 7th, 2018

Alloys and composites are mixtures of elements. The main difference between alloy and composite is that alloy has at least one metal in its composition whereas composites do not have metal components.

teju

• Aug 1st, 2017

A composite metal is a material made of two or more different metals having different physical or chemical properties that when combined produce a material with characteristics different from individu...

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How can we calculate heating of natural gas?

amit kumar panigrahi

• Sep 5th, 2015

We are using gas chromatogrpahy for calculating the carorific value of a combution gas

Nihar

• Sep 3rd, 2015

By thermocouple, pyrometer, We can measure and calculate the heat of Natural gas..?

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I have a liquid mixture in a bottle containing different synthetic substances dissolved from their salt forms (i.e. lidocaine hydrochloride, anhydrous caffeine). These compounds are dissolved in distilled water.
So the question is: How can I separate the dissolved solids from the aqueous solution? Can I do it by forming a hydrochloride precipitate by adding some hydrochloric acid? Or, say the...

Nilesh

• Jun 29th, 2017

In case of solids the lighter solids can be separated by decanting it in water medium when both of the solids are ... Distillation can also be used to separate dissolved salts from their aqueous solutions.

rockky

• Apr 27th, 2017

By evaporation and distillation process. Through many evaporator series to find the Liqueur or product that you need

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What is the difference between Filtration and Sedimentation?

Mani

• Sep 7th, 2017

Sedimentation is a separation of particles depending upon their density whereas filtration is a separation of particles depending upon particle size.

Ravi

• Jul 5th, 2017

Sedimentation is the separation of solids from liquids by gravitational method where as filtration is the separation of solids from liquids by filter medium

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What is the difference between heat and mass transfer ?

swara

• Aug 9th, 2018

Heat transfer may be defined as the flow of energy or heat from higher temperature region to lower temperature region due to temperature difference.
Mass transfer may be defined as flow of conc. of molecules from solute to solvent due to concentration difference.

kumar shivam

• Apr 25th, 2018

Heat Transfer deals with the movement of heat and temperature gradients while Mass Transfer deals with concentrations of a particular substance. ...

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neeru srangal

 Profile Answers by neeru srangal Questions by neeru srangal

• Aug 17th, 2014

Chemical Potential: Change in Gibbs free energy at const T &P
Fugacity: How much chemical potential of a phase differ from its standard state and its equal to partial pressure in case of ideal gas.

Sumaia afroz mim

• Nov 27th, 2013

1.To calculate free energy.
2.chemical potential is 1 type of force to turn a reaction in equilibrium.
3.chemical potential is comparable to escaping tendency or fugacity,its means the tendency of reaction flow to ewuilibrium point.
4.If chemical potential is high escaping tendency will high.

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Editorial / Best Answer

erpcochin  

 Profile Answers by erpcochin Questions by erpcochin

• Member Since Apr-2011 | Apr 12th, 2011

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dude...its Flaring, not flairing....
1) While refining crude oil we get non condensable gases like C1 and C2 which are not economical if condensed using extensive pressurising and cooling processes in Refineries. So we divert these gases to Flare.
2) In the process of refining we sometimes get our equipment over pressurised, this over pressure is released through safety valves to the Flare.
3) We also get some toxic gases like H2S in the process of refining, we divert these to Flare.
4) During shutdown and startup of the process plants, to stabilise the plant we also divert some non condensables, over pressure to the Flare.

pradeep

• Oct 3rd, 2011

After the process of distillation of crude we get many undesirable product which are hazardous in nature , if we expose without combustion ,it creates pollution due to this we do combustion of all undesirable product inflar .

tahir hussain

• Sep 24th, 2011

first of all we should have the concept of the gases remove while treating in refinery operations they can be sox , carbon dioxide , carbon mono and other hazardous gases....... now back to key poin...

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You have two layer of material to provide insulation. They have heat transfer co-efficient (k1>k2).How will you obtain better insulation?

E Smardy

• Mar 22nd, 2013

I dont think you can generalise this problem - at least not for flat plane and cylindrical co-ordinates. It really depends on how much bigger k2 is relative to k1 and how big the pipe thickness is relative to the diameter.

Affwan Hassan

 Profile Answers by Affwan Hassan Questions by Affwan Hassan

• Jul 8th, 2011

I do have a question here, If the material of lower insulation be bounded to the first system, doesn't that result in heat loss?

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What is use of Reynolds number in designing of Heat exchange?

Dhruv

• Jul 17th, 2017

Use for determination of Shell side and tube side heat transfer coefficient, pressure drop, selection of tube side and shell side process fluid,

D.S.

• Apr 17th, 2017

The Reynolds number is first used to understand what flow regime (i.e. turbulent, transition zone, laminar). It is then used to calculate the shell-side and tube-side film coefficients which are then used to calculate an overall U.

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Explain What is Organic Chemistry?

Kingsuk Karmakar

• Jul 13th, 2017

It is the branch or part of Chemistry in which we concern with the compound of carbon. Originally confined to compound to produced by living things.

ankit

• Apr 20th, 2017

Organic chemistry is branch of chemistry which deals with carbon compound

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Reena Mhatre

• Nov 17th, 2017

The valence of an elementor compound does depend on the number of hydrogen ions (H+) accepted or hydroxyl ions (OH-) denoted for each atomic weight or molecular weight.

Tarnveer Singh

• Oct 21st, 2017

Valency is the combining capacity of an element. For metals, it is equal to the number of electrons in the outermost shell of their atoms, and for nonmetals it is eight minus the number of electron...

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