Question

Determine the percentage change in the volume of a sample of carbon tetrachloride when it is pressurized from 1.000 atm to 2.000 atm at 25 C.

Determine the percentage change in the volume of a sample of carbon tetrachloride when its temperature is changed from 25 C to 35 C.

Answer 1

from Boyles law we know, V₂ =(P₁ *V₁)/P₂ where V₂ is the new volume,V₁ is the initial volume ,P₁ is the initial pressure and P₂ is the new pressure.

so ,V₂=1*V₁/2=V₁/2,putting the value P₁=1 and P₂=2

so,change in volume (V1-V2)/V₁=2/7

so percentage change of volume,2/7*100=28.57%

so ,percentage change in volume,1/2*100=50%

from Charles law,V₂=(V₁/T₁)*T₂ ,where T₁ is the initial temp and T₂is the new temp,V₁ and V₂ are initial and new volume.

V₂=V_1*25/35=5V₁/7 putting the value T₁=25 and T₂=35

so change of volume =V₂-V₁)