Assume that you have a sample of gas at 350 K in a sealed contain...

Question

Assume that you have a sample of gas at 350 K in a sealed container, as represented in part (a). Which of the drawings (b)–(d) represents the gas after the temperature is lowered from 350 K to 150 K and if the gas has a boiling point of 200 K? Which drawing represents the gas at 150 K if the gas has a boiling point of 100 K?

Illustration showing gas particles at 350 K and their states at 150 K in different scenarios.

Accepted Answer

Welcome back, everyone consider the gas sample contained in a vessel at 600 Kelvin shown in figure one, if the boiling point of the gas is 400 Kelvin, which figure two through four depicts the gas when the temperature is decreased from 600 Kelvin to 300 Kelvin. If the boiling point of the gas is 250 Kelvin, then which figure represents the gas when the temperature is at 300 Kelvin. So let's first define each of our illustrations looking at illustration one, we're told that from the prompt, this is our gas sample. So this tells us that we have our sample in the gas phase also because we recognize that the atoms given in green are evenly distributed about the available space. In our illustration Note that were given the boiling point of this gas sample equal to 400 Kelvin. Initially. Now looking at illustration to recognize that the atoms are now closer to one another and are confined to their limited space in the container, which tells us that specifically we have a denser form of our sample. And so this will likely be the liquid phase of our sample. Next, we have illustration three which shows the atoms making up our sample tightly packed with one another and organized into a single file. So this should tell us that we have the solid phase of our sample based on that arrangement. And an image for we have a identical arrangement to illustration one where we see again, our Adam's making up our sample which are evenly distributed about the given space. And illustration for meaning that this is also the gas face shown. So according to our first question in our prompt, we're told that the temperature decreases from 600 to 300 Kelvin. So if the temperature is now 300 Kelvin Given the boiling point of 400 Kelvin, we can say that this is less than the boiling point. And therefore, our sample goes from gas phase to liquid face. And so we want to go ahead and choose our figure that represents our liquid phase, which we stated is figure to. So we can define that figure two shows our gas sample when the temperature is decreased From Kelvin, two, Kelvin. So figure two is our first answer for this first scenario. And next, according to our prompt, we're considering now that our boiling point of our gas is 250 Kelvin. And we need to figure out the gas or the illustration representing our gas when the temperature is at 300 Kelvin. So given this new boiling point of 250 Kelvin, If our temperature is now 300 Kelvin, that our gas is being held at, this is greater than the boiling point. And we would say that therefore, our sample remains a gas. So we would say that illustration for represents our sample in its gas face which is held at 300 Kelvin. So our final answers are going to be illustration two and four for both of our scenarios which correspond to choice be in the multiple choice as our final answer. I hope this made sense and let us know if you have any questions.

Key Concepts

Gas Behavior and Temperature

Boiling Point

Phase Changes

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