Gas Definition and 1000 Threads

Young gas giants fly close to their suns Hot Jupiters, giant Jupiter-like exoplanets that orbit 20 times closer to their host stars than the Earth does to the Sun, can form and migrate towards their infant stars in as little as a few million years, researchers at the University of St Andrews...

Hi I am working on Bio Gas Project and I want to know calculations/Formulas to find out elements of Generator. I am MBA students and i have to submit my project report with to start up new firm on renewable energy. Please submit can share your knowledge to help me.

Homework Statement Two glass vessels M and N are connected by a closed valve. M contains helium at 20 °C at a pressure of 1 × 10^5 Pa. N has been evacuated, and has three times the volume of M. In an experiment, the valve is opened and the temperature of the whole apparatus is raised to 100...

Homework Statement A U-shaped tube of uniform section "S" has one extreme closed and the other one open to the atmosphere. The tube contains mercury (M) in the central part, a gas (G) to the left that exerts a pressure "p" and a column of water (W) of height h_w to the right. Then, a mass "m"...

Hey guys, I just want to make sure I went about this the right way...your input would be greatly appreciated. Thank you in advance. 1. Homework Statement A tire is checked before a road trip and the gauge pressure reads 220 kPa (gauge) - State 1 The same tire is checked after the trip and the...

If inert gases are added at constant volume to an equilibrium mixture, the total pressure increases. But the mole fraction of the gaseous reactants or products decrease. Partial pressure ##p=x\cdot P## where P is total pressure and ##x## is mole fraction. How can you say that ##p## remains...

Obviously we don't have the technology to make this work now but I would like to know how plausible this is as a concept/thought experiment. Basically the idea is to discover a gas or liquid with a very high activation energy (for some reaction) so that it can absorb an explosion or control a...

1. The problem/question is as follows: 1 mole of O2 mixed with N2 gas (PN2= 5 atm at 10 degrees celcius in a 1 L flask. What is the total pressure after 2 moles of gas is allowed to escape? How about the partial pressure of O2? R= 0.08206\frac{L atm}{mol K} Homework Equations Using the ideal...

Is it possible to create a protest gas that sedates and lasts for a very long period but has a limit on its severity, no matter how long exposed? If so, may you please elaborate? This is for fiction I'm working on.

Hello all, I have an oxygen tank that is 10 L in volume, pressurized at 500 barr (pressure can be adjusted down to 1 barr out of the tube), and I want to 'bubble' the oxygen into a beaker of water. I will simply use a tube (diameter is around 0.5 cm) connected from the tank and with the other...

I read that biodegradable waste in landfills produces methane, a harmful GHG. But didn't biodegradable waste always exist? We throw paper away, but the trees we produce paper from would have died eventually. Our organic waste comes from plants and animals that would have died eventually too. So...

Homework Statement A sample of an ideal gas goes through the process shown in Figure P20.32. From A to B, the process is adiabatic; from B to C, it is isobaric with 100 kJ of energy entering the system by heat. From C to D, the process is isothermal; from D to A, it is isobaric with 150 kJ of...

I would like to clear out my understanding of gas compressor. If it is moving at constant RPM, is it mean that it can only allow same volumetric flow rate all the time? So the power will remain constant too, (P=VI) then voltage and current will varies. My investigation is to find why there is...

Hi! I wonder what gas pressure really is. This I have learned from Wikipedia: 1) Pressure is a scalar (which means it has no direction). 2) Since a system under pressure has potential to perform work on its surroundings, pressure is a measure of potential energy stored per unit volume. 3)...

If c_v is the specific heat at constant volume, authors substitute this into the first law as follows: c_v d\theta + pdv = dq How can one deduce that equation for any case? Since the specific heat at constant volume is used, the equation would be valid only where there is no expansion i.e...

As per control theory, if a bounded input produces a bounded output then a system can be said to be stable. So assuming that I press my cars gas pedal such that it reaches a fixed position, then the reaction of my car would be to reach a corresponding velocity, and assuming the road to be even...

https://en.wikipedia.org/wiki/Mass_diffusivity http://webwhiteboard.com/#4j3pn87a In the equation specified in Wikipedia for gases. http://imagebin.ca/v/2A0LjLEf0qyT The Average Collision Diamteter & Integral are said to be tabulated and there is a book referenced. Is it possible to get an...

[Moderator's note: Recategorized thread to "Basic".] I'm having an issue at work that I think may be down to temperature. I have a sealed chamber that is 1m X 1m X 1.5m. The chamber has to be pressure tested but the results are all over the show. The only variable is temperature. So my...

In the gas industry you often need to know the installation volume of a system, i.e. the amount of gas it contains in the pipework, fitting and meters. If part of the installation is buried or inaccessible this is difficult to estimate. My concept is to estimate installation volume by...

1. I need to describe the pressure of a gas in terms of the motion of its molecules, and the effect of a change of temperature on the pressure of a gas at constant volume.2. I have looked these up in the internet, but every page says something different. I don't really understand what the second...

My gas chromatography instrument ran out of air while cooling down and now it won't turn on, nor the computer it is hooked up to? Can this be fixed?

A manufacturer quotes a standard CO2 canister contains 16g of CO2 at a volume of 20cm^3. So I need to calculate the pressure in the canister... Using ideal gas law P = nRT/V n = 0.364mol (16 of co2) R = 8.314 J/Kmol (universal gas constant) T = 294k (gas is at room temp 21 deg C) V = 20cm3...

1 mole of all gas has equal number of molecules irrespective of their size. So I just wanted to know when 1 mole of molecules exerts pressure on the wall of a container, will it be same for all gases, irrespective of their molecules sizes.

Homework Statement A thin, closed, insulated cylinder of length L, filled with ideal gas (temperature T, mass M, total amount 1 mole) lies on a table. It is very gently raised to the vertical, after which equilibrium is reestablished. Does the entropy change? What is the temperature change (to...

I have a few simple questions about the process of dissolving a gas in water, if anyone could give me any help it would be appreciated. 1. How do I know the gas has dissolved? i.e. if I "bubble" gas into the liquid how do I know it hasn't just "bubbled" out? Or would this only occur once the...

Hi there, not sure if this is the right sub-forum. I hope so. 1. Homework Statement This is the known data: A isothermal process in the ascending conduit (like a chimney) of a closed-loop circuit, which is thermally insulated from the atmosphere, and in no contact with the air. This is the...

In the constant volume gas thermometer, T (°c)=[P(T)-P(f)]×100/[P(b)-P(f)] (P(T) means gas pressure at T°c P(b) and P(f) for the water's boiling point and freezing point) Is it right?

It is well known that the ideal gas law applies only to an ideal gas, one consisting of particles infinitesimal in size and exhibits no interactions between the particles. Considering an ideal gas, is the ideal gas law valid under non-equilibrium conditions? For example, does the ideal gas law...

I know I can use the specific heat capacity formula to find the temperature of the water during electrolysis as long as I know the mass, specific heat constant of water and joules added beforehand: But I'm not sure how I could find the temperature of the gas produced. If the pressure was...

Is it simply the gaseous state of a liquid substance? For instance, water vapor, in this context, would be the gas state of water after having transitioned from a liquid state.

I've read a fews post about liquid hydrogen boil off, but could use a bit more clarification; insight on the following thought experiment would be really helpful: What happens if I take a 1 L steel vessel, put 1 L of liquid H2 into it, seal it off, and let it sit in a room at 25C? The density...

Hello, I am studying transport in the free electron gas model and I don't understand how to compute the average of the electron density current. We are given the hamiltonian ## H=\int \psi^\dagger(r,t)(-\frac{\hbar^2\nabla^2}{2m}+e\vec{E}\cdot\vec{r})\psi(r,t)## where the ##psi## operator is...

If you shake up a bottle of soda and it gets slightly larger because the disturbed gas in solution is trying to expand but cannot, could you use the difference in (THE SMALL AMOUNT THE BOTTLE ACTUALLY SWELLED) and the (POTENTIAL AMOUNT THE GAS WOULD SWELL IF NOT CONTAINED) to determine the...

Hi, I Have one Temperature gauge with 2Meter Cpillary. Range is 0-250Deg Centigarde. it was field with Nitrogen gas immersion length (sensing element) was 100mm in the process. How much gas should field to get the 250Deg Centigarde temperature. and how much pressure is required to field the...

I have an argon line used for atomization and backfilling a VIM melting chamber. If there is a leak on the argon line (at a fitting, valve, etc), will this leak actually draw in air when gas is turned on and flowing through pipe creating a mixture of argon and air?

Hi all, While studying for my exam (and doing review questions) I came across a problem that I couldn't solve: 5. Zirconium metal and chlorine gas react to form zirconium (IV) chloride Zr + 2Cl2 = ZrCl4 a) What volume of chlorine gas must be used at 350 degrees Celsius and 50 kPa to produce...

Chestermiller submitted a new PF Insights post Reversible Vs Irreversible Gas Compression/Expansion Work Continue reading the Original PF Insights Post.

Gas pressure in a closed chamber at constant temperature will last forever, unless leaking or chemical reactions occur. Examples are methane in underground gas reservoirs that are hundreds of thousands of years old. Gases stored in bottles. Pressure comes from the gas atoms (with velocity)...

A rectangular (simplified) container with rigid surfaces, has a certain mass of ideal gas within it, and it accelerates in free space, undergoing rectilinear motion. There are no dissipative forces. Now, since the container moves, its kinetic energy increases, and since the temperature of the...

I know the total volume of a gas cylinder, the pressure in it, and the outlet pressure that needs to be maintained. The flow rate is also known. How should I calculate the total duration the cylinder will last? Also, what should vary if the cylinder is a liquidified gas cylinder?

Haw can I calculate/estimate the potential gas consumption in an industrial oven after the reduction of the temperature setting point?

Homework Statement A gas cylinder contains 4x10^4 cm cubed of hydrogen at a pressure of 2.5x10^7 Pa and a temperature of 290 K. The cylinder is used to foll balloons. Each balloon contains 7.24x10^3 cm cubed of hydrogen at a pressure of 1.85x10^5 and a temp of 290K when full. Find the number...

Homework Statement A mixture of two ideal gases, the first one atomic and the second two atomic are put in normal conditions in a calorimeter with volume 1 liter hermetically closed. After it is given 10J thermal energy the mixture temperature is grown 14.2 K. Find the molar specific heat for...

Homework Statement A mass of 3 mole gas is heated in a constant pressure of 1.5 atm, expanding from 40 litre to 60 litre. Find the temperature growth. Homework Equations V1/V2=T1/T2. The Attempt at a Solution I thought to write V1/V2=T1/T2. But I don't know T1. The answer is 121 K in my book.

So perhaps I'm not the only one here on PF who's heard about this .That said, besides the gas cloud G2 concealing a low-mass star, I cannot help but wonder what azimuthal angle G2 made its closest approach to the supermassive black hole Sagittarius A*. The reason this is relevant is because...

For the past year or so, I've been experimenting with Isobutane. I used to get it in relatively cheap canisters of r600a from amazon.com and AliExpress, and that worked fine. Now, however, AliExpress has NO purchase options for r600a, and amazon.com will not ship it to the US, even though they...

Homework Statement So first the task: Determine the average value of the kinetic energy of the particles of an ideal gas at 0.0 C and at 100 C (b) What is the kinetic energy per mole of an Ideal gas at these temperatures. I took the above right out of the pdf we got from our professor. I know...

Homework Statement I've uploaded a diagram showing a two beam interferometer that can be used to monitor changes of refractive index in a gas cell. it is illuminated with monochromatic light of wavelength λ. The light is linearly horizontally polarised. The two polarizing beam splitters (PBS)...

I'm sure that this has been posted before but... I want to substitute a gas motor in my 12kw Generac home backup generator with an electric motor 48-volt 4hp@4000 rpm series.. I would run this electric motor from the grid and power my home from this newly design generator.

Currently found a paper which calculates Casimir Force of a trapped Bose gas in d-dimension. But what is the use of calculating Casimir Force of a Bose gas greater than 3 dimension? Any example where this calculation might be helpful?