What is the relationship between volume of a gas and its absolute temperature? Why does the temperature need to be converted from Celsius to Kelvin? It's related to Charles's law.

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Charles’ law is a relationship of temperature and volume. This law explains that as the temperature is increased, expansion of the gas will be seen. This is because as the temperature is increased; the kinetic energy increases as well, thus making the gases to expand.

`V = k T`  

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Charles’ law is a relationship of temperature and volume. This law explains that as the temperature is increased, expansion of the gas will be seen. This is because as the temperature is increased; the kinetic energy increases as well, thus making the gases to expand.

`V = k T`  

V is directly proportional to T. When volume (V) increases, it's because temperature (T) is increasing. The Expression for Charles law can be explained as:

`(V_1)/(T_1) = (V_2)/(T_2)`

Temperature should always be converted to kelvin for certain reasons. Kinetic theory of gases suggests that all movements of molecules will stop at 0 K (-273 C) or the absolute zero since the rate of movement of gases is a function of temperature. Celsius measuring was measured relative to water and was generally used around the world but has nothing to do with any of the gases. 

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