PHYS 1010Q Lecture Notes - Lecture 14: Ideal Gas Law, Scale Of Temperature, Celsius
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As the temperature of the gas tends toward -273 c, the volume of the gas tends to zero. This happens for all gasses regardless of their initial volume and temperature. Thus there is a universal lower limit to coldness . When the molecules have lost all of their kinetic energy, they reach an absolute minimum of temperature. We can use this to de ne the zero" on a new temperature scale called the kelvin or absolute temperature scale, tk = tc + 273. Example: cryotherapy is a medical treatment in which surface skin lesions are frozen, most commonly by the use of liquid nitrogen. If the kelvin temperature of ln2 is 77k, If t is the kelvin temperature, then the volume of the gas at constant pressure is simply proportional to t, i. e. v~t. Known as charles" law, the result can also be expressed as.
