Consider three gases all at 298 k: hcl, h2, and o2. list the gase...

Question

Consider three gases all at 298 k: hcl, h2, and o2. list the gases in order of increasing average speed.

Accepted Answer

Alright. So here, the conditions are STP standard temperature and pressure. And we have three separate one liter samples of helium, oxygen and chlorine gas is here. Okay, behaving ideally. So, we're um, you know, we're going to assume that they're ideal gasses. We need to rank them in order of increasing average kinetic energy and increasing average velocity. Right? So average kinetic energy, we know that as the temperature increases, the average kinetic energy increases. But because they are at STP so standard temperature and pressure, the temperature is the same for all three of these samples. So, because the same temperature, we're going to say same average kinetic energy. So all three of these samples of all three of these gasses have exactly the same average kinetic energy. So, there's no reason to rank them. They're all going to equal to one another in terms of average kinetic energy. Now, for the average velocity is going to be a little bit different. Right? So, we're going to say the lighter gasses are going to be moving faster. Mm hmm. Okay, so, we need to take a look at the molar masses of each of these gasses and the one that is the lightest will be the one that's moving faster and then the heaviest one will be moving slower. So, let's go ahead and take a look. So helium Healing. If you take a look at the periodic table, it weighs about 4g per mole, Then we have 02, right? Oxygen weighs 16 g. There are two of them here, obviously, because it's So to this will be 32 g per mole, And then finally seal to chlorine gas. Again, there's two of them here and they weigh 35-45 each. So that will give us 70. grams per mole. So we can see that the lighter one is helium, followed by 02. And then finally last one is C. 02 being the heaviest one. So increasing average velocity. That means we have to start with the slowest one. So, for average velocity, The order will be cl two, Followed by 0.2, And then finally, the fastest one is H. E. helium. Alright, so this is one of the answers. And then for the kinetic energy, we said that they're all the same. So, you can just rate them equaling one another. All right. Thanks so much for watching.

Consider three gases all at 298 k: hcl, h2, and o2. list the gases in order of increasing average speed.

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