Gases Definition and 476 Threads

I was reading that helium does not accummulate in the Earth's atmosphere due to the fact (a claim) that it is too light to be retained by gravity and diffuses out into space. Does anyone know the physics that prevent the atmosphere seeking the vacuum at whooshing out into space. Is there a...

hello,i have question to ask here. :smile: 1. which of the following is not correct for an ideal gas? A. the average kinetic energy of the gas increases with temperature B. the force of repulsion between molecules is proportional to the distance between them C. the gas...

Hello My first posting and doubtless it betrays my ignorance :smile: Doing the basic maths for an ideal gas, I find that the speed of a molecule exceeds the speed of sound through the same gas. I know jets make a terrific 'boom' when they break the sound barrier. Why don't gases go boom...

In my physics book, the 4 properties of an ideal gase are 1. nonviscous 2. steady flow (laminar) 3. incompressible 4. irrotational My question is the properties of being irrotional the same as the vector functions that have a Curl=O iff irrotational My physics book states the...

hello :-p i want to ask about the deviation of real gases under low temperature and high pressure. :-p my reference book states that carbon dioxide deviates more than nitrogen and hydrogen,this is because the order of boiling points of is decreasing from carbon dioxide to hydrogen.this...

Suppose you have an ideal gas in a closed container. The gas molecules will be moving at random at very high speeds. Now I've figured out that the probability of a gas molecule for being in the center of the container is higher than the probability of being near the sides. Then should we also...

Hai, I have the following situation: I have a closed container with a certain gas at a certain temperature(Tg) and pressure(pg). Now I open the container. The gas will escape through the opening to the atmosphere in order to create a pressure balance. There will be no significant...

During mass measurement for a gas, why must you measure the gas, release some, and measure it again?

ok, I am having trouble understanding exactly what this problem wants from me, its asking: At what temperature would the translational rms speed of hydrogen molecules be equal to that of oxygen molecules at 300K? and the answer it gives me is 19K... but I really have no idea where to even...

A balloon is filled to a volume of 63.0 mL at a temperature of 58.0oC. The balloon is then heated up at constant pressure to a temperature of 93.0oC. What is the final volume of this balloon, in liters? We haven't even covered this yet in chem, but for some reason they are giving...

THEORY OF THE IONIZATION OF GASES BY LASER BEAMS could anyone help me about is theory ican't find it plase iknow i ask a lot :blushing: but sometime my mad don't work enough :confused:

A 1.00 mol sample of an ideal monatomic gas is at an initial temperature of 300 K. The gas undergoes an isovolumetric process acquiring 500 J of energy by heat. It then undergoes an isobaric process losing this same amount of energy by heat. Determine a) the new temperature of the gas and b)...

gases are kept in the air by their large kinetic energy, no? if we observed one particle in the atmosphere, however, would we not observe it to fall in a parabolic arc(in between collisions, which keep it propped up) much as a macroscopic particle would? this just gets me thinking...

I have been trying to understand the concept of specific heat ratios. From what I gather, the ratio is defined as the quotient of the Specific heat at constant pressure and the Specific heat ratio at constant volume. Could anybody give me an insight into what leads to gases having different...

which greenhouse gases is the most powerful? :eek:

Maybe some of you biology experts can help me with this problem https://www.physicsforums.com/showthread.php?p=245521#post245521 Thanks Nautica

Can someone please calculate the volume occupied at STP by 2.99times10 to the 23rd power molecules of Chlorine. Thank you Very much.

Hi all! This what I've done: First I pumped underpressure into a glass container, checked the manometer's reading and then weighed the container on two different scales. Then I opened the valve a bit, checked pressure and weighed the bottle etc. I did this 10 times. So what I've got is 10...

As temperature increases, the solubility of gases decreases, but why? Gary

do any exist (possibly an isotope?) or is it posible to create an ionized gas without heating it up (i.e. making it a plasma)?

Here's the problem: 4. A diving bell in the shape of a cylinder with a height of 2.10 m is closed at the upper end and open at the lower end. The bell is lowered from air into sea water ( p = 1.025 g/cm3). The air in the bell is initially at 16.0°C. The bell is lowered to a depth (measured...

We've been set the question of- In an isothermal expansion, and ideal gas at initial pressure Po expands until its volume is twice its initial volume. When the gas is compressed adibatically and quasi-statically ack to its original volume, its pressure is 1.32Po. Is the gas monatomic...

I was wondering if anyone could point me in the direction of some good information regarding why the solubility of gases decreases with the increase of temperature. The only description I have is a cheap example involving a pop can where as the temperature of the can is increased the kinetic...

sorry but this si really hard for me i don't understand these 2 question. Explain why some noble gases such as Xe will form compounds and some such as Ne will not? What kinds of orbital arrangemenets contribute to the bonding in ethene H2C = CH2 thats a double bond i tried and i...

At what depth (roughly speaking) will gaseous oxygen dissolve (because of the surrounding pressure) into the water? Again, not asking for a precise figure. Thanks

when you equate the two formulas for ideal gases, one is evetually left with a formula to calculate the ke. of the ideal gas (3/2kt i think) how come the ke is independent of the mass of the molecule ?