Questions tagged [pressure]
For questions about gas pressure, or the effect of pressure in general on chemical species, substances, or reactions.
309 questions
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Osmolarity and osmotic pressure
You have discovered a new strain of bacteria called Tankeromyces subtilis that has a special outer membrane that is capable of withstanding high levels of osmotic pressure. These bacteria can survive ...
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What is the difference between the units 'torr' and 'mm of Hg'?
According to present definition torr and mm of Hg differ though slightly.
I am still confused over it. Can someone write an explicit answer differentiating between them and the reason for ...
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How can you achieve negative pressure?
Pressure is the magnitude (absolute value) of the force over the area, so how can that result in a negative value for pressure as would happen in certain circumstances?
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How do I calculate the pressure of a known liquid in a sealed container heated above boiling point?
If I have water in a sealed container heated to say 150 degrees, how do I determine the amount of pressure being generated in the container? What about for other liquids? I have searched extensively ...
7
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Bicycle tube inflation with 16g CO2 cartridge
How much pressure will a 16 gram cartridge of $\ce{CO2}$ (carbon dioxide) provide in a bicycle tire? Remembering my high school chemistry (forty years ago) and googling, I came up with this answer:
...
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How will the pressure of a gas in manometer change if it goes to a place with higher pressure?
Imagine a manometer where air pressure is $\pu{0.8 atm}$ and the gas pressure is more. We move it to sea level which the air pressure is $\pu{1 atm}$. How will the gas pressure change? (the ...
4
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2
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Why does the cathode ray tube only start glowing at low pressures?
I am considering the cathode ray tube of the set up, when the cathode rays were discovered:
Voltage = very high
Gas = any
Atmospheric Pressure = changing
At different pressures, there are different ...
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2
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What does negative pressure mean in the context of this manometer?
I have a basic question on a closed manometer:
I see that in this case the pressure of gas is lower than that of the liquid, which is why the liquid is higher on the left side. Now, what I don't ...
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Calculating the equilibrium constants for parallel reactions
So, I am attempting to calculate the equilibrium constant for two separate reactions.
$$\ce{A + B<=>C + D}$$
$$\ce{A + B <=> C + E}$$
I have figured out the final pressures at equilibrium ...