Question

A quantity of gas in a piston cylinder is at room temperature (20°C) and is heated in an isobaric(constant pressure)process. What will be the temperature of the gas in degrees Celsius when it has expanded to a volume of 0.600m3?

Answer 1

From Charles' law

At constant pressure, volume of gas is directly proportional to absolute temperature of gas.

Here initial temperature, = 20°C or 293 Kelvin

initial volume of gas, V1 = 0.100 m^3

Final volume of gas, V2 = 0.600 m^3

Let final temperature be T2

So V T

So V1/ V2 = T1 / T2

So T2 = (293)(0.600)/ (0.100)

So T2 = 1758 Kelvin

Therefore final temperature will be 1758 kelvin or 1485°C