Co2 Definition and 295 Threads

After almost falling asleep while driving the other day, I got to thinking about CO2. I started to wonder if due to normal respiration of the driver and or occupants, CO2 levels in a car can rise to levels that can inhibit responses or even lead to unintended sleep, and make driving unsafe. I...

From NASA, a year in the life of Earth's CO2, at, http://www.wired.com/2014/11/nature-run-co2-visualization/

I'm trying to understand the issue of CO2 and global warming better. Can anyone explain to me the mechanism by which CO2 in particular converts infrared radiation to heat. I've had a semester of college chem and three semesters of physics, but I'm not sure what theory I should be able to use...

Let's say you have a 20 bar atmosphere of 95% nitrogen, 3% oxygen, 1% argon and 1% Co2 cooled to 0 F. Would Co2 be liquid or gas?

Measuring CO2 I have been searching for an answer to this for quite a while, so I'm hoping somebody here can help me out. I've spent quite a bit of time digging and reading, and I've found plenty of information, but I'm not always sure what to make of it. I am working on making myself a small...

The IPCC uses a figure 1.2°C for the direct response to a doubling of CO2, from 280 ppm to 560 ppm. http://www.grida.no/climate/ipcc_tar/wg1/pdf/tar-01.pdf I came up with an equation of 4(log 560)-4(log 280)= 1.2041199. Is this the best way to fit this curve?

it is known that the standard combustion enthalpy of methane is -882 kJ/mol CH4 + 2 O2 --> CO2 + 2 H2O Hc = -882 kJ based on hess's law, if a reaction is reversed, so does with the enthalpy CO2 + 2 H2O --> CH4 + 2 O2 Hc = +882 kJ which makes the reversed reaction become...

I have a project that I have been thinking about and need to us CO2 for it. What ways are there to measure the amount of CO2 left in a cylinder if its mounted to a moving object? I thought about the normal scale method but with bumps it wouldn't be accurate. You can't really measure pressure...

Hello everyone, I would really appreciate your help on figuring out the issue of undesirable CO2 production in this situation. Homework Statement In a mixture of CaCO3 + CaHPO4; I am observing undesirable CO2 production under conditions of 20-25°C (room temp) and an undesirable excess of...

How is the carbon in carbon dioxide electrophilic? There is no partial positive charge on the carbon in carbon dioxide because the molecule is symmetrical.

How much oxygen would make it's way down to the water if no mixing happens when put into container? I always hear of blanket of CO2 over a liquid. I'm trying to relearn some thermodynamics principles. Would the partial pressure between the CO2 never allow the oxygen diffuse into the water if...

Can someone tell me how much CO2 I could dissolve in a 5M aqueous solution of potassium hydroxide and how to calculate this? This would be done at high pressure and low temperature, and if you can tell me what temperature and pressure would be optimal and why, or how to figure that out...

OK folks, [SIZE="1"]first of all, let me thank those of you who have helped me with previous questions... perhaps this is why I keep coming back! This time, I'm just asking those of you who are better than I am at this if I did this right and thus, got the correct result. I think I did...

Hi! I am trying to evaluate the amount of CO2 gas produced from the reaction of CaCO3 and HCl. Theoretically the amount of gas that can be achieved from the 0.1 g of calcite is around 24 cc (T=21 degree and P is 1010 mb). But, the experimental value that I obtained is around 30 cc. I have no...

Hello, I'm not sure if this is in the right section, but I figured chemical engineering would be best for this. I wanted to know what kind of disadvantages there are for today's CO2 scrubbers and how they can be improved. I am wondering this because I am doing a clean tech competition and...

News reports in the past day tell us tha the temperature in Antartica reached -99.2C (-135.8F). Wikipedia says that the melting point of CO2 is -78C (-109F) Does that imply that there might have been natural CO2 snow falling there? If so, that is a very interesting fact.

Homework Statement On a per-molecule basis, methane is 26 times more effective as an infrared absorber than is CO2. Calculate the corresponding ratio on a per-unit-mass basis, and compare it with the 20-year GWP for methane. What's the reason for any discrepncy you find? (CO2 atmospheric...

Homework Statement calculate the amount of carbon monoxide necessary to form 100 g of carbon dioxide. The Attempt at a Solution 2CO + O2 -> 2CO2 Oxygen atom mass ≈ 16μ Carbon atom mass ≈ 12μ There are 2 carbom atoms and 1 oxygen atom 100/16+24 = 2.5 2.5(16+12) = 70g Answer: You need 70g...

To give a little background I have machine tool training but not much other than what I have taught myself in general physics. Its a VERY interesting subject for me and I have thought about going back to college just to take a course or two relating to it. I come up with various ideas I would...

Hi folks, I was interested in developing a tiny CO2 cartridge and wanted to ask a few questions of anyone who could/would answer. The cartridge should be as small as possible and preferably as flat as practicable, but it could simply be cylindrical. It should contain enough CO2 to fill around...

I read in several websites that triple bonds cannot rotate freely. However, I've also read in the book "Chemical Principles" the following lines: "Various types of evidence suggest that the electron density around the two C-O bonds in CO2 is actually cylindrically symmetric—that is, the...

Lets say you have planet with 2 Earth radii and 8 Earth masses. The atmosphere is 50 bar and is made up of 85% nitrogen, 10% hydrogen 3% argon, 1% CO2 and 1% other gases. The planets average temperature is 280 K/44 F. Since CO2 is a liquid at this pressure and temperature would it form rivers...

I done the absorption experiment i.e absorption of CO2 from air using 1M NaOH .Can anyone please tell how to analyse the Liquid sample after absorption. I found the concentration of NaOH after and before the experiment,difference in Concentration gives the concentration of CO2.is it the...

I have two problems actually: Problem 1 Homework Statement What mass of carbon dioxide can be produced at a temperature of 1500 *C and an atmospheric pressure of 92.5 kPa, if 15.5 L of acetylene gas is burned at STP? Homework Equations PV = nRT P1V1/T1 = P2V2/T2The Attempt at a Solution...

This was described by Michael E. Mann,professor of meteorology at Penn State University. http://www.meteo.psu.edu/holocene/public_html/Mann/news/interviews.php Others have had readings that give similar results. "While scientists and environmentalists have used the daily milestone to...

I want a way to perform electrolysis on CO2, in order to split it into carbon and oxygen atoms. Does anyone have any ideas on how I could do this?

I want to ask that which element can react with CO2 gas to split c and o or what will happen if NaOH reacts with h2co3 NaOH+H2CO3---> 2CH3COONa+2H2O+5O2 IS IT CORRECT?

Homework Statement Saturated liquid CO2 is at T= 293 K and P=5.72*10^6 Pa and undergoes throttling to P=1.01*10^5. The resulting solid and vapor mixture is at T = 195 K. What fraction of the carbon dioxide is vaporized? (The enthalpy of the saturated liquid in the initial state is 24,200...

I would love to know much total energy, in Joules is in a typical paintball/airsoft 12g CO2 cartridge? Thanks everyone.

Hi folks! English is not my native language so please excuse my bad grammar. I am a geology student working on a project about a lake when an interesting puzzle piece - a newspaper article from 1844 - came up. This is not homework and I don't even know if a solution exists to my question at...

H2O and CO2 must mix in an open line (not closed pressurized vessel) via stainless steel membrane; the dilemma is: H2O incoming line pressure is approximately 50psi and CO2 line pressure is approximately 100psi. The problem arises when both elements collide at the point of the membrane where...

I was thinking how it is possible to obtain carbon dioxide capturing it from the atmosphere and releasing it from the solution. I've read that "air meets a mist of a sodium hydroxide solution...the carbon dioxide is absorbed by reaction to form sodium carbonate...this solution is pumped into an...

Ok so I wish to try solve a problem at work I will try explain as best I can . Problem Definition; Filling of a bundle of cylinders 17 x 50litre ( 850 000 k/m^3). 30 % Co2 in the cyindrical vessal followed by input of Nitrogen 70% to a final pressure of 200 bar Due to production...

Test question: "Respiring cells release CO2 into the bloodstream..." 1. 2. For this question, I was thinking about the nature of CO2. It's not an acid or base, so how could it drop or raise the pH level?! So I put that the pH level won't change (B), but the real answer is C (it will...

CO2 is supposed to create a "doublet" peak at 2350 cm-1 according to my IR correlation chart. Why is this doublet created? As DrDu explained in my previous post, two peaks are seen for the N-O bond because it has IR-active symmetric and asymmetric stretches. But CO2 is a linear molecule, and...

As the title says, why diesel engines produce less CO2 than gasoline engines and how is this related to the more torque and less power in diesel engines? PLEASE only a fluid dynamics or thermodynamics approach. Spent hours on searching to find why petrol engines produce more CO2 emissions...

Hi everyone! I'll say it from the start that I'm not knowledgeable with chemistry but I'll call for anyone's help in making me understand this simple reaction. I'm interested in finding out what reactions are occurring when CO2 is dissolved in water. The scope is for my hobby which is...

Is there a way to build a rig so that I could compress CO2 gas to apressure of roughly 7MPa? I am building a CO2 Thermosyphone and need high pressure CO2 in order to get convection to occur. Any help or advice would be greatly appreciated

Homework Statement I have two questions: (1) Suppose we have solution W, X, Y and Z. Their pH are 8, 12, 4 and 2 respectively, from the information given which of the solution W, X, Y and Z will liberate carbon (IV) oxide from trioxocarbonate (IV) salt? (2) Between CaCO3 and CaO, which is...

Hi all, Would really appreciate some help on this problem I can't seem to figure out. Brown coal has an energy content of 15MJ/kg, carbon content 65% by weight, burning in a 30% efficient steam power plant. Calculate the CO2 emission intensity (kg CO2 emitted/kWh delivered).Assume complete...

Hi, I and my team-mate have proposed an idea to develop a CO2 emission reduction device to be installed in automobiles. We have mentioned that it will operate on the principle of 'active adsorption of CO2 on charcoal'. However, although the basic scientific principle is pretty simple...

I am trying to perform the calculation that will tell me how much (mass or moles) carbon dioxide (CO2) I would theoretically need to bubble through a 3 liter solution of a 2.6 M aqueous sodium hydroxide (NaOH) solution in order to reduce the pH of the solution to 12. I know that the reaction...

I was wondering at what heat does CO2 begin to breakup as a molecule? If I make an electrical arc and put it through air will I be breaking up CO2?

At my work, we go through a lot of liquid CO2 (LCO2), and dealing with the 500 pound LCO2 dewars is a real pain. I'd like to look at options for us making our own LCO2 instead, but have been having trouble finding information about small-scale LCO2 generation on the web. We use the LCO2 for...

hi everyone, is it possible to easily ionize N2 and CO2 at a high flow about 50g/s, and which is the easiest way? thanks

I'm asking because I want to know whether the technique of rebreathing N2O back into a balloon reduces the the amount absorbed when inhaled again. It obviously dilutes the N2O with some CO2 and water vapor, but I assume the dilution is pretty minimal.

I you look at the phase diagram, CO2 is in liquid state at 5,11 atm and t= -56 C. But why does he convert directly to solid state at 1 atm? Again, if you go down from five to one atm, you should be in gaseous state ? Is it have something to do with temperature ? What happens with temperature...

Homework Statement Estimate the lifetime of CO2 in the atmosphere of Mars. Homework Equations The Attempt at a Solution What is he asking? How long has the CO2 been in the atmosphere? It just seems rather vague.

Creating CH4 from H2 + CO2 This was a topic raised before. However a point that should have been made and wasn't is as follows. The problem with electricity is that it cannot be stored. Wind energy often has to be dumped at times of low demand (night, holiday periods, weekends). The amount and...

My plan is to burn bio-matter like weeds and wood (or bio-fuel) in a zero-pollution scheme that collects the particulate material, oil, water and CO2 generated from burning the hydrocarbons and uses it for other purposes. It would filter out any toxins or NOx and vent N2. I know that I can...