+Titurel Are you referring to how pressure from a skate or something should melt ice and allow us to skate? Or how a shoe melts the ice and makes us slip? I've heard that that is a myth actually. There is always a layer of water on ice even at temperatures of -40 Celsius.
yeah that's not really the reason for slippery because the effect is to small: still, at 1:52 it's a mistake and the slope is negative for water and silicon and positive for most other substances. just watch the previous video. He gives a solid explanation. you only have to take in account that the volume of water is bigger in liquid phase.
Ice is not denser than liquid water; this is why ice floats on top and doesn't freeze the bottom of the oceans. Volume of liquid water > volume of ice so dS/dV is positive.
Molar volume of ice > molar volume water. This means that ice is actually less dense than water (hence the floating) because less material occupies the same volume for ice than for water
It`s well known that water melts spontaneously at normal conditions through an endothermic process with encreasing entropy, delta S being positive. On the other hand, by considering that ice is denser than liquid water, we can infere that fusion process volume change is negative, so dp/dT=dS/dV is also negative. NOT POSITIVE AS YOU SAID SIR. How dear you?
don't think that is secret of life. when u r talking about the water on the bottom of ocean, u better consider the pressure. it will affect the frozen point
I doesnt understand anything in this lecture!!!!?.... I have watched upto 19 lectures what i have concluded is that they are just deriving equations formulas but not properly discussing anything...only few lectures are good.......Im done with these lectures...
