Question

Define absolute zero temperature? Explain the effects of change of temperature on the volume of a given mass of a gas at a constant pressure

Answer 1

According to Charles' law, at constant pressure, the temperature (-273°C) at which, theoretically a gas would have no volume, is known as absolute zero. All gases liquefy or solidify before reaching this temperature. However, practically this temperature is impossible to attain because gas is a state of matter and it should have some volume.

At constant pressure, the volume of a given (fixed) mass of a dry gas is directly proportional to its absolute temperature. Hence, we can say, if the temperature increases, the volume of that given mass of dry gas also increases, and vice-versa.

The expression is given in the above picture which explains this fact more clearly and effectively. Refer to the above attachment too.