You are high up in the mountains and boil water to make some tea. However, when you drink your tea, it is not as hot as it should be. You try again and again, but the water is just not hot enough to make a hot cup of tea. Which is the best explanation for this result? (a) High in the mountains, it is probably very dry, and so the water is rapidly evaporating from your cup and cooling it. (b) High in the mountains, it is probably very windy, and so the water is rapidly evaporating from your cup and cooling it. (c) High in the mountains, the air pressure is significantly less than 1 atm, so the boiling point of water is much lower than at sea level. (d) High in the mountains, the air pressure is significantly less than 1 atm, so the boiling point of water is much higher than at sea level.

Video transcript

Hello. Everyone in this video. We're giving a scenario and then we're trying to see which situation would fit best. So the scenario is that you're camping at the top of a mountain and you're trying to boil a pot of water. So we're seeing at one temperature the boil, the water will boil. And we're trying to see what the pressure of the air is. So let's think about this. Since we're at the top of a mountain, it means we're at a higher altitude. If we're at a higher altitude we're going to have low pressure or lower pressure. When we mean lower pressure, we mean less than one A. T. M. And if we have lower pressure than the bp of water, so the boiling point of water is also going to be lower. If we follow this little road map here then are correct answer should be B is that the water will boil at a lower temperature and that our air pressure is going to be less than 1 80 M. So our final answer for this problem is going to be beep. Thank you all so much for watching