Question

The volume of a certain mass of a gas was found to be 500cc when
the pressure was 800 mm Hg. If the pressure is decreased by 25%. Find
the new volume of a gas. Temperature is kept constant

Answer 1

Explanation:

Here you can find the answer..

Answer 2

$\sf \large Given,$

$\sf V_{1}=500\;cc$

$\sf P_{1}=800\;mm\;of\;Hg$

$\sf V_{2}=?$

$\sf P_{2}=800-\frac{25}{100}\times{800}$

$\sf P_{2}=800-200$

$\sf P_{2}=600\;mm\;of\;Hg$

$\sf \hookrightarrow Using\;Boyle's\;law,$

$\sf \to P_{1}V_{1}=P_{2}V_{2}$

$\sf \to 800\times 500=600\times V_{2}$

$\sf \to \frac{800\times 500}{600}=V_{2}$

$\sf V_{2}=666.66\;cc$