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Vapor is a form of gas and for the topics we have covered so far when vapor is mentioned in a problem it is safe to assume they are talking about gas! For now I don't think there needs to be any specification on how they are alike or different.
I think for the sake of this course, vapor and gas are the same thing. However, at least for me, I think gas typically refers to something that is naturally in gas phase, such as nitrogen and hydrogen, while vapor refers to something that is "vaporized" into gas, such as water vapor and iodine vapor.
For the most part and in this class specifically, a gas and a vapor are synonymous. I think the technical difference is that vapors are the gas phase of a substance that would usually be liquid at room temperature/standard conditions.
I think for the purposes of this class, the two are the same thing since they share similar properties. But gases are a state of matter, and vapors usually coexist in equilibrium with their liquid/solid states but gases don't. Vapor suggests that the substance has undergone a phase change, but gas does not.
Riddhi Mehta 2C wrote:Does vapor usually refer to water or can it refer to any other element as well?
I looked online and found that in general, vapor is a mixture of two or more different phases at room temperature, and these phases are typically in liquid and gaseous phases. On the other hand, gas usually contains a single thermodynamic state at room temperature. So in short, yes, vapor will tend to have H2O as part of the mixture.
Both terms are interchangeable. I think it just has to do with the context/topic. Vapor is often times used when talking about phase changes (i.e. vaporization of water), while I feel like gas is used when it's being manipulated in a system. you rarely hear "vapor at a constant pressure". Hope this helps!
I'm pretty sure a vapor and a gas are the same thing? After doing a little google search, it seems like there could be a difference. It seems that a vapor is a mixture of a gas and a liquid, where the gas is the main composition.
I thought it was the same thing, and I am assumung that we do not need to know the difference between the two for the class. However I found that vapour phase consists of a phase with two different substances at room temperature, whereas a gas phase consists of a single substance at a defined thermodynamic range, at room temperature.
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