Critical temperature

[Drilon]

Can someone explain me the concept of the Critical temperature. What does it mean, where is it applied.

 

 

Thanks in advance

[insane_alien]

its a thermo dynamics term for the temperature past which the gas and liquid phases are indistinguishable there is also a critical pressure. substances past the critical point are reffered to as super critical fluids.

[weknowthewor]

The critical temperature, Tc, of a material is the temperature above which distinct liquid and gas phases do not exist. As the critical temperature is approached, the properties of the gas and liquid phases become the same resulting in only one phase: the supercritical fluid. Above the critical temperature a liquid cannot be formed by an increase in pressure, but with enough pressure a solid may be formed for materials other than water. The critical pressure is the vapor pressure at the critical temperature. On the diagram showing the thermodynamic properties for a given substance, the point at critical temperature and critical pressure is called the critical point of the substance. The critical molar volume is the volume of one mole of material at the critical temperature and pressure.

 

Critical properties vary from material to material, just as is the case for the melting point and boiling point. Critical properties for many pure substances are readily available in the literature. Obtaining critical properties for mixtures is somewhat more problematic.

[swansont]

The critical temperature, Tc, of a material is the temperature above which distinct liquid and gas phases do not exist. As the critical temperature is approached, the properties of the gas and liquid phases become the same resulting in only one phase: the supercritical fluid. Above the critical temperature a liquid cannot be formed by an increase in pressure, but with enough pressure a solid may be formed for materials other than water. The critical pressure is the vapor pressure at the critical temperature. On the diagram showing the thermodynamic properties for a given substance, the point at critical temperature and critical pressure is called the critical point of the substance. The critical molar volume is the volume of one mole of material at the critical temperature and pressure.

 

Critical properties vary from material to material, just as is the case for the melting point and boiling point. Critical properties for many pure substances are readily available in the literature. Obtaining critical properties for mixtures is somewhat more problematic.

 

You should at least cite your source when you copy-and-paste from another web site, like http://en.wikipedia.org/wiki/Critical_temperature, as a matter of professionalism.

 

But it's also a matter of using copyrighted material without proper attribution, which raises issues of violating forum policy and also wikipedia policy.

 

from http://en.wikipedia.org/wiki/Wikipedia:Copyright_FAQ

"Text in Wikipedia, excluding quotations, has been released under the GNU Free Documentation License (or is in the public domain), and can therefore be reused only if you release any derived work under the GFDL. This requires that, among other things, you attribute the authors and allow others to freely copy your work."