Triple point Definition and 29 Threads

Seems a crazy coincidence that the tiple point of water is also virtually the same temperature at which water freezes/melts. Or is it that the triple point of water was always going to be at the temperature that water freezes/melts (so those two neccessarily co-exist) and then above water there...

M 6.4 - 12km WSW of Ferndale, CA https://earthquake.usgs.gov/earthquakes/eventpage/nc73821036/executive 2022-12-20 10:34:25 (UTC) 40.523°N 124.393°W 16.1 km depth https://en.wikipedia.org/wiki/Juan_de_Fuca_Plate#/media/File:Juan_de_fuca_plate.png Numerous aftershocks (Mag 2-4) occurring...

I am able to solve part (a) using the relationship ##\frac {P_1} {T_1} = \frac {P_2} {T_1}##, where ##T_1 = 273.16## since its the triple point of water and ##T_2 =T_s## ##(T_s = ## melting point of sulphur). I use the two readings for thermometer A to get ##P_1## and ##P_2## as mentioned in the...

Hello, A few years ago I heard about a list named the "10 characteristic experiences of physics", may I know if a such list exist? A few years ago, at the physics workshops at the Palais de la découverte, I saw the so-called "triple point of water" experience. The experimenter told us that...

What does it tell you about a substance? A hight melting and boiling point means that the molecules hold together strongly, as in tungsten. A low melting point, as in hydrogen, means they're kinda loose. But what does the distance between them tell you? Something something entropy yadda yadda...

Homework Statement The bulb of a constant volume gas thermometer is immersed in an ice/water/water vapour mixture at equilibrium and the recorded pressure is 0.400 atm. It is then immersed in a boiling liquid and the pressure is 0.844 atm. Sufficient gas is then removed from the bulb such that...

why triple point of water is used to define SI base unit of thermodynamic temperature even though for triple point we need to define both temperature (. 01) and pressure(partial pressure = 611.73 pa). this thing we can do with ice point and boiling point which is same when temperature and...

By definition we have h=u+pv for a system where h=specific enthalpy u=specific internal energy p=external pressure applied on the system v=specific volume of the system The internal energy is arbitrarily taken to be zero at the triple point of water i.e, u=0...

Suppose we heat a pure substance in solid phase at a constant pressure corresponding to it's triple point data up to it's triple point temperature where all the three phases of the substance are known to exist in equilibrium. Will further addition of heat at the same pressure result in...

In a problem in Callen's book I was asked to say what was the latent heat of fusion at the triple point for ammonia. I answered "without performing any algebra, 0J". Because I remember a video I saw on youtube about the triple point () and now I read on wikipedia which seem to confirm that...

I know the triple point of water is at 273.16K and atmospheric pressure But how are we going to make it as a reference when we measure temperature of something? Thank you

Hello, Im new here and I hope someone of you can answer this probably trivial question. I tried to find the answer in many of phyisc/termodynamic texbooks but in vain. http://imageshack.us/photo/my-images/62/123002h.jpg/ http://imageshack.us/photo/my-images/62/123002h.jpg/ According to...

Water triple point T is 272.16K http://www.omega.com/temperature/z/pdf/z186-193.pdf http://media4.physics.indiana.edu/~courses/p340/S11/Lecture_Presentations/ITS-90_metrologia.pdf But several internet pages say that water triple point is at 273.1598 K...

Homework Statement Prove that a on-component system must have a triple point. You may assume that ΔHfusion>0, if needed. Homework Equations C (components) = #of distinct substances - # of distinct chemical reactions Gibbs Phase Rule: degrees of freedom= components - phases + 2 or...

Homework Statement The metal Eborium (Eb) has three solid phases: a, b, c. At a pressure of 0.45 atm, the a and b phase coexist at 70 K (temperature). The molar volume of Eb(a) is 1.23 liter/mole and that of Eb(b) is 1.47 liter/mole. The heats of transformation are as follows: Eb(a) --->...

What in heaven's name is the "'Water Triple Point"'? And besides all the theory behind it, could you posit an experiment to prove it?

Homework Statement Hi there. I was trying to solve this problem from Callen. It says: In the vecinity of the triple point the vapor pressure of liquid ammonia (in Pascals) is rerpesented by: \ln P=24.38-\frac{3063}{T} This is the equation of the liquid-vapor boundary curve in a P-T...

i know triple point is the temp. that water's(here use water as example) solid、liquid、gas state can be existent . http://www.youtube.com/watch?v=BLRqpJN9zeA the video is amazing and so, how can he change water's state? (solid、liquid、gas state can be existent　at the same time, but how can we...

Homework Statement I need to calculate the temperature and pressure at the triple point. natural log of pressure of the liquid/solid: lnp(solid)= 29.411-(5893.5K/T) lnp(liquid)=22.254-(3479.9K/T). The compound is uranium hexafluoride, MW= 352.02. I do not believe the actual molecule matters...

Homework Statement I need to calculate the temperature and pressure at the triple point. natural log of pressure of the liquid/solid: lnp(solid)= 29.411-(5893.5K/T) lnp(liquid)=22.254-(3479.9K/T). The compound is uranium hexafluoride, MW= 352.02. I do not believe the actual molecule matters...

While looking up Buckminster Fullerene for kicks, I was surprised to find that there wasn't a melting/boiling point for it. I did some digging and found that in fact it doesn't melt, but it sublimes at 800 C. which I understand. However, what I couldn't find was some sort of phase diagram for...

Homework Statement P(at triple point in torr of water) 100 200 300 400 P(in torr for gas w/ respect to Pressure above) 127.9 256.5 385.8 516.0 The previous table gives the observed values of the pressure of a gas in a constant-volume gas thermometer at an unknown temperature T and at the...

So I'm trying to come up with some neat experiments to perform for some kids and I was thinking of showing them the effect of different temperature and pressure on the phase changes of water. Specifically, I was interested in subliming water by freezing it in a flask under reduced pressure and...

Homework Statement We're given various temperature and pressure values for benzene as well as its melting point and densities for when it's a solid and when it's a liquid. We're asked to construct a phase diagram based on the given data and locate the triple point - graphically and...

Why is the triple point of water .01C while the freezing point 0C? It seems contradictory.

When we have hail rain, that is water and little solids in the form of ice crystals falling from the sky, is that evidence of the triple point of water being reached in the atomsphere hence H20 gas, liquid and solid coexist at the same time with the heavier two, liquid and solid falling down...

I'm having some trouble grasping the concept of the so called "tripple point". I can't begin to imagine that three different fases can possibly coexist. The temperature is 0,01C isn't it? Well, if some snow has this temperature, and then turns into a liquid, then that's because the temperature...

Just a quick question about a homework I have been set this week! One of the questions is to say what the triple point is on a PVT diagram when it is a point on a PT diagram. Is it still a point or is it a line? Also, we have to state what physical property of water is different from that...

This is my first post, and I am lost in this thermodynamics question. The question is as follows: The equations of the sublimation and the vaporization curves of a particular material are given by ln P = 0.04 -6/T (sublimation) ln P = 0.06 - 4/T (vaporization) where P is in...