The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid
Questions tagged [boiling-point]
305 questions
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Any examples of liquids volatile at room temp but non-flammable?
I'm thinking of something similar to the liquid used in the classic dipping birds. Temperature differential in two "bulbs" at each end of a tube should cause vapor to expand and push liquid to the top, shifting the weight and tipping it. The closer…
Devon Hansen
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Which factors best account for the increase in boiling point?
The boiling points of $\ce{CH3COCH3}$, $\ce{CH3COC2H5}$, and $\ce{CH3COC3H7}$ are $56˚C$,
$80 ˚C$, and $102 ˚C$, respectively. What factor(s) best account(s) for this?
I believe london dispersion forces is one of them. Is dipole-dipole…
1110101001
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Why does tomato soup "explode" when boiled?
When you boil tomato soup it very easily "explodes" when reaching the boiling point. Why is that?
A related question has been answered here before: Why do some solutions eventually stop boiling and start "popping" as they get more…
cvr
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Why is boiling point of hydrogen greater than of helium?
If we compare the boiling point of hydrogen and helium using molecular weight criteria (both have London dispersion forces as intermolecular forces of attraction because both are non polar then the one which have which have higher molecular weight…
Bhavishya Singhal
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Why is the boiling point of trichlorofluoromethane lower than that of chloroform?
If $\ce{CFCl3}$ has a higher molar mass, how come $\ce{CHCl3}$ has a higher boiling point?
$$
\begin{align}
\mathrm{bp}(\ce{CFCl3}) &= \pu{23.77 °C} \\
\mathrm{bp}(\ce{CHCl3}) &= \pu{61.15 °C}
\end{align}
$$
user95897
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Boiling methanol in a microwave
Some protocols (metabolomics) use boiling methanol for metabolites extraction and cleaning glassware. Is it safe to boil methanol in a microwave?
Luis
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Is there a relationship between boiling point and van der Waals constants
Is there a relation of the boiling point of a gas with its van der Waals constants, $a$ & $b$?
I know if constant $a$ is greater, then the boiling point will also be greater, because of more attraction between the molecules, but does the boiling…
FreakyLearner
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Why do alkyl chlorides have lower boiling points than the corresponding alkyl bromides and iodides?
To my knowledge, the $\ce{C-Cl}$ bond is stronger than the $\ce{C-Br}$ and the $\ce{C-I}$ bond.
I always thought that the stronger a bond, the harder it is to break so the boiling point would be higher.
If that is the case, why does, among…
huhu
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Why does hydrazine have a higher boiling point than water?
$\ce{N2H4}$ has a boiling point of 114 °C, which is higher than the boiling point of water. Why is this so?
Both $\ce{N2H4}$ and $\ce{H2O}$ have two lone pairs, so the number of hydrogen bonds per molecule seems to be the same. Also, the…
Cyclopropane
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Does sodium ethoxide (sodium ethanolate) have a boiling point, or does it decompose?
According to Wikipedia, $\ce{C2H5ONa}$ melts at 260°C, but no boiling point is given. What will happen if $\ce{C2H5ONa}$ is heated further?
Martin
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Variation of Boiling point with pressure from Clausius-Clapeyron equation
For a first-order phase transition such as water to steam , we write Clausius-Clapeyron equation as:
$\frac{dP}{dT}= \frac{L}{T \Delta V}$
Now what I infer from this equation is that if the phase-transition takes place at a lower T (that is boiling…
Lost
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difference in boiling point of 2-iodopentane and 3-iodopentane
There is no difference in boiling point of 2-fluoropentance and 3-fluoropentane, so is chloro- and bromo-. But why is there a difference in the boiling point of 2-iodopentane and 3-iodopentane, up to 10 degree Celsius?
Tony1300
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Boiling point of water
I was doing an experiment on boiling-point of water and I was supposed to measure the temperature of the water when it boils, but I saw the there were droplets of water on the lid of the pot, and I was confused if I should take the temperature of…
Galaxycutecat
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Polarisability of alkynes, alkenes and alkanes
I have noted a little trend in the boiling points of alkynes, alkenes and alkanes. Upon searching for the explanation, I have chanced upon an answer written by M.A.R. (Alkane, Alkene, Alkyne boiling point). In his answer, he explains the boiling…
Tan Yong Boon
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Is varnish with a flash point above 40 celsius safe in a microwave oven?
I've painted regular white mugs and want to varnish them too.
But my varnish has the following specs:
Gloss varnish based on alkyd resin.
Flash point: Above 40 degrees celsius.
Is it safe to varnish on some sections of the painting on the outside…
user961627
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