Oxygen has a boiling point of 90K, and nitrogen has boiling point of 77K. Which is a liquid and which is a gas at 80K?

I tried to look into the phase diagrams, but I still don't understand. Can somebody please help and explain to me??? THANKS A LOT!!!

gas

|
|
90K b.p.O2
|
|
80K
|
|
77K b.p.N2
Anything above 90 K is a gas. So at 91K, O2 is a gas; N2 is a gas. At 89K, O2 is a liquid (it boils at 90K) but N2 is a gas(because it boils at 77K). At 88K, O2 still a liquid; N2 still a gas. At 87 K, O2 still a liquid; N2 still a gas. etc. So at 76K, both O2 and N2 are liquids. 80K is below the boiling point of O2 but above the boiling point of N2.
Draw a diagram, something like I've done above, for this type question and you can SEE where you are on the drawing.

I HATE THIS WEBSITE

To determine which substance is a gas and which is a liquid at 80K, we can compare the boiling points of oxygen and nitrogen to the given temperature.

The boiling point of oxygen is 90K, which means that oxygen will be a gas at temperatures above 90K and a liquid below that temperature.

The boiling point of nitrogen is 77K, which means that nitrogen will be a gas at temperatures above 77K and a liquid below that temperature.

Given that the temperature is 80K, both oxygen and nitrogen are below their respective boiling points. Therefore, both oxygen and nitrogen will be in a liquid state at 80K.

So, at 80K, both oxygen and nitrogen would be in their liquid forms.

Certainly! I'll explain how to determine whether oxygen and nitrogen are in a liquid or gas state at 80K using their boiling points.

The boiling point of a substance is the temperature at which it changes from a liquid to a gas. If the temperature is above the boiling point, the substance exists as a gas, and if it is below the boiling point, it exists as a liquid.

In this case, we have the boiling point of oxygen at 90K and nitrogen at 77K.

Since the boiling point of oxygen is higher than the boiling point of nitrogen, we know that oxygen requires a higher temperature to boil and transition from a liquid to a gas.

Now, let's determine what state each substance would be at 80K:

1. Oxygen: With a boiling point of 90K, oxygen would remain a liquid at 80K because it has not reached its boiling point.

2. Nitrogen: With a boiling point of 77K, nitrogen has a lower boiling point than 80K. Therefore, nitrogen would be in a gas state at 80K because it has surpassed its boiling point temperature.

So, at 80K, oxygen would be a liquid, and nitrogen would be a gas.

I hope this explanation helps! If you have any further questions, feel free to ask.