Why is boiling point higher at higher elevation

When the vapour pressure equals atmospheric pressure, the liquid boils. Here's a video that demonstrates the effect of atmospheric pressure on boiling point. Related questions How are vapor pressure and boiling point related?

How do you find vapor pressure given boiling point and heat of vaporization? Why is vapor pressure reduced in a solution? Why is vapor pressure lowering a colligative property? Why does vapor pressure increase with temperature?

The lower boiling point means water will cook off more quickly, and at a lower temperature. Decrease by minutes per 30 minutes of baking time. Baking at higher temperatures means products are done sooner.

Increase by 1 to 2 tablespoons at 3, feet. Boil 0. The beauty of this method is you can cook the steaks well in advance. Baked or Air. What About Boiling Water? Water boils at around You have answered 0 of 3 questions correctly and your score is:.

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Follow Twitter Instagram Facebook. Why does water boil faster at higher altitude? How does air pressure vary with altitude? Does altitude affect cooking? Wonder What's Next? Try It Out Are you ready to take your knowledge to a higher level? Grab a friend or family member and check out the following activities: Want to take part in a science experiment with other kids around the world? Jump online to check out Under Pressure: Boiling Water.

You'll need help from an adult friend or family member. The goal is to see at what temperature water boils where you live. You'll need a few simple items to get started. When you're finished, you can enter your findings online and compare them with other results from around the world!

When you need to boil water, does it matter whether you start out with hot or cold water? Find out by doing your own experiment. Follow the instructions for the Hot vs. Cold Water: Boiling Experiment online. What do you think the answer will be? Write down your hypothesis, and then conduct the experiment. What did you learn? Was your pre-experiment hypothesis correct? If you do much cooking, you will often see instructions that tell you to add salt to boiling water. Find out today by conducting a simple experiment.

Be sure to get help from an adult friend or family member before conducting the experiment. Share what you learn with them! Did you get it? Test your knowledge. What are you wondering? Wonder Words bowl meal cook skill heat fact cereal ascend mountain altitude pressure molecule delicious convenience straightforward circumstance atmosphere ingredient Take the Wonder Word Challenge. Join the Discussion. Now, what about using boiling to purify water—how is that impacted by altitude?

Boiling is the surefire way to kill pathogens and make water safe to drink. Do you need to worry about the lower boiling temperature of water in the high country? Many experts, however, contend that simply allowing water to reach a rolling boil renders it safe, regardless of your elevation—see this World Health Organization document , for example, as well as these posts from Off the Grid and Backpacker. Even the lower boiling-point temperatures at high mountains on Earth is sufficient to kill pathogens.

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