Question

10 g of gas at one atomospheric pressure is cooled from 273.15°C to 0°C keeping the volume constant. What is the final pressure?

Options

• 273 atm

• 2 atm

• `1/2` atm

• `1/273` atm

Answer 1

`1/2` atm

Explanation:

According to Gay Lussac's law, at constant V and n

`"P"_1/"T"_1 = "P"_2/"T"_2`

`1/546.30 "k" = "P"_2/273.15`

`"P"_2 = 273.15/546.30 = 1/2` atm