Question

flourine gas exerts pressure of 297 torr when the volume changes to 250 mL at STP.what was the original volume?

Answer 1

Given:

Initial Pressure P₁=297torr

Let initial volume be V₁

According to the question ,Final Volume =250mL

In final condition gas is at STP. it means T=273K,and P₂=760torr

So, at constant temperature :-

P₁V₁=P₂V₂(Boyle's Law)

297×V₁=760×250

V₁=$\frac{760×250}{297}=639.73mL$

So, Original Volume =$639.73mL$