Question

At a constant volume, a quantity of an ideal gas has a pressure of 700 mm Hg at 300 K. At what pressure, the temperature will be halved?

Options

• 1400 mm Hg

• 1000 mm Hg

• 250 mm Hg

• 350 mm Hg

Answer 1

350 mm Hg

Explanation:

At constant volume

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

∴ P₂ = `("P"_1"T"_2)/"T"_1`

= `(700  "mm Hg" xx 300//2)/300`

= 350 mm Hg