Calculate the value of absolute temprature from Charles law?
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Answer:
Absolute zero
The absolute zero temperature is the lowest possible temperature. At such an extreme temperature, molecular motions like vibrational, translational, rotational ceases. And its value is −273.15 °C or 0 K.
Charles' law
Charles' law is an empirical law that states when the pressure of a fixed amount of gas is constant, the volume is directly proportional to its temperature. In mathematical terms, V = kT.
Relation between both
Both are related by the graph. It is a volume versus temperature (in °C) graph plotted at constant pressure.
As per Charles' law, when the temperature of an ideal gas decreases, its volume also decreases. Volume approaches zero at t = −273.15 °C, the x-intercept of the graph. If we extrapolate the line below that temperature, it will give negative volume, which is nonsense. Thus, −273.15 °C is the lowest possible temperature.
We can also prove this using the equation of Charles' law. It is V = kT. Here, T is the temperature expressed in the kelvin. V is zero only when T = 0 K, which is −273.15 °C.
