Question

1800 cc of gas was collected at 650mm pressure. At what pressure would the volume of gas be reduced by 40% of its original volume, if the temperature remains constant.

Answer 1

Step 1- Given data:

P₁ = 650 mm

V₁= 1800 cm³

V₂= Volume reduced by 40 %,

Remaining volume is 60 % of its original volume = 1800 x 60/100 = 1080 cm³

P₂= ?

Step 2- Write the formula:

According to Boyle’s law

P₁V₁= P₂V₂

Step 3- Put the given values

650 x 1800 = p₂ x 1080

P₂= $\frac{650x1800}{1080}$

P₂= 1083 mm

Thus, the pressure is 1083 mm