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Results tagged with thermodynamics
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user 1370
Covers the study of (primarily homogeneous) macroscopic systems from a heat/energy/entropy point of view. Consider also using the tag: [statistical-mechanics].
0
votes
Accepted
how to calculate gibbs free energy per unit mass, per unit volume, and per mole?
"Calculating" is some word that can understood very differently. From "scratch" ie ab initio, only using physical values, nothing from chemistry level. This was possible when I studied for the molecu …
- 6,944
1
vote
Does the foam on top of boiling maple sap affect the rate of evaporation?
Yes and No,
The evaporation is controlled by the heat flow into that evaporator.
(How does that evaporator look like? Could You post/link a picture?)
So foam is not the control, but the limiting fac …
- 6,944
0
votes
How does a maple syrup evaporator work?
(If you let the fire go out, once the
sap cools it will redistribute itself
until it is homogenous.) I think
somebody will probably tell me it has
to do with the distance the sap has
flow …
- 6,944
0
votes
Boundary conditions for heat transfer from metal to air
Here are some Buzzwords:
Fourier,
Reynolds,
Nusselt,
Prantl,
Grashof
Good luck.
- 6,944
16
votes
Do my noodles cook quicker when the water is boiling or when it is just about to boil?
My instinct would be that food will cook quicker just before the water starts boiling because steam conducts heat slower than water and so when the food is in contact with the steam bubbles it rece …
- 6,944
6
votes
Why does boiling water in the microwave make a cup of tea go weird?
A common problem with microwave is that you lack control of the
temperature of the water.
Second problem is that the water is heated from the top and the sides of the mug mostly.
Result is, that the …
- 6,944
1
vote
Ice skating, how does it really work?
I remember
reading in a book (on surface physics) during my grad study on
this topic.
There was a diagram on friction of a steel "skate" on solid
argon at and below argon melting temperature.
The …
- 6,944
69
votes
Cooling a cup of coffee with help of a spoon
With respect to the content in the cup, all Your hampering
with the spoon is irrelevant. Cooling of a hot coffee is
achieved by vaporisation of water. At temperatures between
100 and say 50 °C the …
- 6,944