Condensation Definition and 141 Threads

I've been reading about this topic in a book recently and it states that when steam (water vapor) condenses on a cold surface in the presence of air, the increase in air concentration at the condensation interface causes a reduction in the steam pressure and hence, temperature. I am wondering...

Im on the tech team doing an outdoor concert series. I have a dance show coming up this weekend and I am having a hard time keeping the stage dry. Its a nice big black stage radiating its heat away at night and around 9 pm it starts to get a bit wet and slippery (very no bueno for dancers) I...

I know clouds are just condensed water vapor forming tiny droplets. Why do they have flat bottoms and all at the same plane? Is their a air density threshold that clouds form at? Thanks simply curious.

i will experiment about condensation nucleus. ( make cloud artificial. is my topic ) in my experiment i need high efficiency of condensation nucleus high efficiency mean which one can drop temperature faster and lower please know me some

Need some help here! My plant just installed a water scrubber for controlling methanol emissions. Results obtained from stack tests have consistently shown the flow rate of the gasses from the scrubber outlet is about 30% of gas flow rate into the scrubber. From process knowledge, most of the...

Hi. For a Bose gas, my textbook states that below the critical temperature, which is given by n(λth)3/(2S+1)=2.612, the fugacity z=eβμ≈1. Why is this? The most basic explanation possible would be ideal, as I only need the rough idea. Thanks! :smile:

I have read the rules and this IS not homework...i work in a factory Hi I have Vapour at 52 degrees from a tank (-87.7kPa) going to a Condensor (heat exchange) under vacuum pressure (-87.7kPa)...The Condensor uses water on 1 side to condense vapour on the other side... 1. What...

Homework Statement We have an ideal Bose gas in gravitational field. Show that the critical temperature( the temperature in which the condensation is starting is: T_c = T^0_c( 1 + \frac{8}{9} \frac{1}{ζ(3/2)} (\frac{\pi mgh}{kT^0_c})^{1/2} ) Attempt Lege artis; Firstly I want to...

1. Why the mass of steam formed during condensation is equal to 9H2 While studying about the lower calorific value of fuel the equation is L.C.V.= H.C.V. – heat of steam formed during combustion Now here in the book they have written that, Let ms = mass of steam formed in per kg of...

Hello everyone, Could someone help me with the following question: I'm trying to find out the equations that govern this process; why if you condense steam in a cylinder is a partial vacuum created (such as in early steam engines)? The pressure difference then causes the atmosphere to push...

Hello guys, I would really need some help on the following problem. Consider a non-interacting & non-relativistic bosonic field at finite temperature. We are all aware of the fact that such a statistical system is well described by the grand-canonical ensemble in the limit N→∞. However...

Hello guys, I'm trying to understand bosonic condensation and i would really need your help. The actual question, before getting into the details is: "Why Bose-Einstein Condensation doesn't take place in a one-dimensional (1D) space?" In what follows i'll give you my own (mis)understanding so...

Homework Statement A gaseous mixture containing 0.190 mol fraction of carbon tetrachloride (CCl4) and 0.810 mol fraction of dry air is initially at 62.0°C and 1141 mmHg. If this mixture is cooled at a constant pressure, at what temperature does the CCl4 first start to condense? I already did...

Folks, Can anyone point me to an online source detailing an example of the static condensation process in finite elements. I believe sub structuring is another term used to describe the same process. Regards Bugatti

Hello, I'm struggling with the following problem. We have a dryer in our plant which evaporates acetone and with a blower the vapour is driven to a scrubber. However the efficiency of the scrubber is not sufficient and that is why I want to place a plate heat exchanger in the vapour line to...

Dewing of a mirror or object glass can be countered with various devices and methods, but its occurrence inside a closed system is particularly problematic. I have received the following enquiry (from an experienced observer who has used several instruments over many years) concerning...

I will be attempting to make liquid nitrogen from air. Part of the process involves passing air compressed to 200 atm through a coil and rapidly expanding it. The expanded air that does not form liquid from the rapid cooling will pass back over the condensor coils in a counter-current fashion to...

Just looking for a bit of advice on a problem I am currently having. I am doing some research into the condensation characteristics of steam when under vacuum. However, I am having difficulty maintaing the desired level of vacuum of around 0.06Bar in my current system. Anytime I achieve the...

Hey all, I was going through a few video lectures on youtube. To be specific, this is the video I watched. Now, the professor in the video talks about Dynamic reduction techniques and puts Guyan reduction in that category. For a fact, Guyan reduction is also called Static condensation and...

Hello all. Consider the case whereby one brings out a cold drink on a hot day. Why do water droplets form on the surface of the cold glass? I would think that when water molecules in the gaseous state collide with the glass surface, they transfer some energy into the glass. Therefore by the...

1st part of Exercise #27 is: Define a point p in a metric space X to be a condensation point of a set E in X if every neighborhood of p contains uncountably many points of E. Suppose E is in R^k, E is uncountable and let P be the set of all condensation points of E. Prove P is perfect...

On a warm day, why do droplets of water appear on the outside of a cold glass of water? I don't really understand partial pressure and saturated vapour pressure, but I know it has something to do with this. Like when partial pressure = SVP, the water will boil, but at what point will water...

Good afternoon. I am wondering if quantum entanglement could be created between two thermodynamically isolated Bose-Einstein condensates of the same atom produced at the same time in close proximity. Due to the similarity of the systems' mathematics regarding their quantum states (wave...

Homework Statement Bose-Einstein condensation of a fluid occurs when the de Broglie wavelength of a "typical" particle becomes greater than the average nearest-neighbor distance. One can interpret the momentum in the de Broglie equation as p=\sqrt{<p^{2}>} where <p^{2}> means the thermal...

Homework Statement Estimate the Bose-Einstein condensation temperature of Rb 87 atoms with density of 10^11 atoms per cm^3. Homework Equations T=\frac{n^{2/3}h^{2}}{3mK_{B}} The Attempt at a Solution This should be just a standard plug and chug question, but my answers are not...

I have spent many hours today trying to determine at what distances certain substances will condense in protoplanetary disks around stars or temperatures different to that of our sun. I have come to the conclusion that the Inverse-Square Law is key to determining this. However, I am unsure as...

I am working on a desalinization project and need technical advice. These are the basics: If I have a 1,000 sq ft pool of heated water, covered with a chilled baffle, then enclosed in a greenhouse, how much liquid water can I produce through condensation in one day? Any ideas or feedback...

The understanding of the origins of our planet (as well as the other planets in the Universe) has always remained a question to astronomers. Inherently, the application of Newton’s known concepts of gravity has granted us the ability to make educated assumptions concerning planetary formation...

hi experts This ought to be obvious but it sounds wrong. If I have a pipe carrying butane at a constant flow rate at room temperature fed from a liquid gas bottle without a restrictor so that the gas is almost condensing, then have a constriction in the pipe to accelerate the gas, will...

What is the difference between Liquefaction & Condensation, although both deal with change of state from gas to liquid?

Hi, I'm building a lens and stupidly rinsed one component before putting the lens body together with epoxy glue. Now when I leave the lens in the sun the trace of water left in the vacuumed lens body turns into condensation and blurs out the vision. I've seen loads of forums suggesting using...

I'm considering some issues regarding condensation at work. If you have a cold surface surrounded by room temp air, does this air need to be in motion in order for condensation to occur?

Hello, I am attempting to calculate the amount of condensation formation on the underside of a roof (steel sheet). moist air is on the underside of the roof, ambient air on the upper side I know the following properties; RH of moist air Temperature of moist air, T1 Temperature of...

Hi everyone, I'm new here and I'm a little worried because I'm not able to explain some facts about this topic. I'm trying to model and simulate a condenser that is in the top of a distillation column for a control project. The inlet stream is a multicomponent ideal mixture and it can be...

Hi everyone, So I am performing a michael aldol condensation experiment and i was wondering if anyone can help with the naming. An example of naming would be 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone. This example was in my lab manual; the compound I am synthesizing, has a (p) or...

Homework Statement A volume Vi = 29.9 L of air at temperature T = 23 °C is compressed at constant temperature to a volume Vf = 5.6 L. The relative humidity of the air before compression is R = 57.9 %. Saturated water vapour in air at this temperature has a vapour pressure vp = 2.83 kPa and a...

I know the ideal gas law applies, but how?

Hi all, I would like to confirm the following calculations as I have had to get each from various sources. a) Condensation occurs when Vapour Flow is below the Dew Point? b) Dew point = Temp (DegC) - (100 - Relative Humidity) / 5 c) Vapour Pressure = Relative Humidity (%) x SVP...

I'm not absolutely sure whether condensation of ideal gas of bosons (without any interactions) is a first order phase transition. Some people claim that it isn't first order phase transition because the entropy of a system is continuous function at critical temperature. According to me however...

Hey guys, So I have to make a presentation on this topic. Does anyone of you know of any recent applications of this phenomenon or helpful introductory paper/article? I'm doing my own independent research too but thought that you guys might know of a very helpful resource/idea that I can look...

I am a 2nd year mech engg student. I have a basic doubt in condensers. The steam from turbine exhaust enters the condenser & gets condensed during which its specific volume decreases resulting in formation of partial vacuum. Now according to rankine cycle the process in a condenser is a isobaric...

[b]1. When water vapor is condensing or liquid water is freezing? Homework Equations [b]3. The two are affected by the energy of the sorrounding environment is being absorbed into the water.

I notice that some bosons can exhibit Bose-Einstein condensation while others cannot (photons, phonons). Is it true that the bosons can have BEC only when the total number of particles is conserved? In this case, the chemical potential approaches zero at T_c, and particles begin to cluster...

I have a 50% carbon dioxide and 50% nitrogen gas mix at 1800psig, 70*F. Is there a reference source for the dewpoint of the CO2 in that mix? Assuming the temperature falls below that dewpoint and the CO2 condenses, will it return to a mix as the temperature is raised? thanks, kw

Homework Statement A spherical star of uniform density p and radius R is formed by the condensation of the interstellar dust from large distance due to gravitational forces. Find the energy change that occurs at some intermediate stage as the radius increases from r to r+dr Hence derive an...

How can I calculate the amount of water can be obtained from a cold plate (below dew point) considering the air flow (cfm), air temp, relative humidity % and size of the plate? Thank you.

Homework Statement I need to determine, using the Cauchy Condensation Test, whether or not the series 1/(n * Log(n)) converges. Homework Equations The Attempt at a Solution I believe that this series converges iff 2^n(1/(2^n*Log(2^n)) converges (Cauchy Condensation Test). I...

Homework Statement A sample of 1.00 mol H20(g) is condensed isothermally and reversibly to liquid water at 100°C. The standard enthalpy of vaporization of water at 100°C is 40.656 kJ mol-1. Find w, q, change in internal energy, and change in enthalpy for this process. Homework Equations...

EDIT: I figured out my error, so don't worry about reading through all of this unless you find it an interesting problem Homework Statement This is Baby Rudin's exercise 2.27: http://img63.imageshack.us/img63/584/fool.png Instead of proving for R^k, I did it for an arbitrary separable...

show that in the thermodynamic limit the bose gas condensate does not contribute to pressure for ideal bose gas in volume V with N particles.and physically explain. how to get it start?and what will b its physicsl explanation? kindly reply soooooooooooon