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anonymous
 one year ago
Which has higher air pressure when boiling water, lid or no lid?
anonymous
 one year ago
Which has higher air pressure when boiling water, lid or no lid?

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MrNood
 one year ago
Best ResponseYou've already chosen the best response.1This question is not very well phrased. 'Atmospheric' pressure is normally taken to mean the ambient pressure surrounding the 'experiment'. It is clear that this does not change when the lid is put on. HOWEVER  what I THINK the question means is whether the pressure above the boiling fluid changes. If you think about it  the steam has to 'lift the lid' to escape  so the pressure must increase over when there is no lid. You know the temperature that water boils in atmospheric pressure  but you cannot answer the second part unless you know the ACTUAL pressure inside the pot with the lid on

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.0has anyone ever made a decent cup of tea on the summit of Mount Everest? if not, why not?

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1you can make a statement about the RELATIVE value of the temperature  but unless you know the actual pressure you cannot put a number "degrees" on the change of temperature

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@MrNood so without the lid on the air pressure is greater? This question is about how boiling process is a cooling process. dw:1443825835399:dw

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1no  imagine if the lid was fixed (like a pressure cooker) as you heat the liquid  what happens to the pressure. NOW  the lid is a 'very heavy lid' it takes a force to lift it up  so when the lid is raised  it is the pressure of the steam that is lifting it
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