# Questions tagged [temperature]

A measure of the average kinetic energy of the particles in a sample of matter; may be expressed either in kelvin (symbol K) or in degree Celsius (symbol °C).

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### Pressure and temperature relation of Novec 1230

I am working on a concept turbine for a school project which operates at low temperature so it's necessary for me to have a pressure temperature relation of this chemical or novec 7100 also is okay.. ...
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### How do I calculate the temperature change in a gaseous reaction?

So, with $\pu{3 mol}$ of $\ce{H2}$ and $\pu{3 mol}$ of $\ce{Cl2}$ and given the reaction $\ce{H2(g) + Cl2(g) -> 2 HCl(g)}$ with $\Delta H=\pu{-184.6 kJ/mol}$, I am supposed to calculate the work ...
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### Water getting hotter once frozen?

I packed a fridge with temperature sensors and took over the temperature control in order to have extra cold beer. One of those sensors is submerged in the middle of a container containing a 4.5% ...
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### Is the relation [K] = [C] + 273.15 exact? [duplicate]

In reading Atkins' Physical Chemistry, the first section of the first Chapter, the author says that the conversion equation between the absolute temperature and celsius is exact and at the same time ...
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1 vote
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### What polyatomic substances have the lowest known freezing points at standard pressure?

At standard pressure, helium never freezes, so that's clearly the coldest liquid—but it's also a monatomic substance. Diatomic hydrogen freezes at 13 K. Neon freezes at 24 K. And then the next coldest ...
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### Temperature effects on pKa and pKw

I am an industrial electrician apprentice who needs to learn more about pH-measurements and how the temperature effects the measurement itself (I am in charge of all the pH measurements on the ...
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### What would oxygen or nitrogen snow look like?

I was watching a video of what would happen if the earth got kicked out of the solar system and at one point it was mentioned that oxygen and nitrogen snow would form. So would such snow be any ...
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### Will there be a temp change in free expansion [closed]

I did a little thought experiment, where I place an infinitely long beaker filled with some gas, which has a moveable piston at the open part. So if I place this beaker in vaccume, there will ...
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### What is the difference between fire and warm body? [closed]

A burning body has flames (Candle flame)whereas a hot or warm body (warm utensil or body being hot but doesn’t burn )is just very hot. Keeping hand near a burning body makes you feel hot but not ...
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1 vote
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### What is the fundamental difference between temperature and energy? [duplicate]

We know that temperature is proportional to the average kinetic energy of a system. We also know that temperature is not the same as energy because the temperature is intensive while the temperature ...
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### The formation of ice crystals on/in frozen food that has been defrosted and then frozen again

I made a mistake. I put my ice cream in the refrigerator instead of the freezer and left it there for a night. I realized my folly the next day. I put it in the freezer. When I took it out, I noticed ...
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