Aquantity of gas has a volume of 1.5 m3 and an absolute pressure of 95 kpa. when the gas is compressed to a volume of 0.5 m3, what is the new absolute pressure of the gas? (assume that there’s no change in temperature.)

at isothermal condition we know that when temperature is constant we will have

here we will have

Now gas is compressed and its final volume will become

now from above formula we have

now we have

so final pressure will be 285 kPa

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length