Need Help With Chem

Question

If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature. What is thenew volume?

Answer 1

At constant temperature, we are dealing with Boyle's Law:

P1V1 = P2V2

(748 mm)(22.5 L) = (725 mm)(P2)

P2 = 23.2 L

(NOTE: the question says it is a compression but clearly 725 mm Hg is a lower pressure than 748 mm Hg. So this is an expansion, not a compression. That is why the volume increases).