5.19 Boyle's Law (Corrections in yellow)

5.19 Boyle's Law

·         5.19 use the relationship between the pressure and volume of a fixed mass of gas at constant temperature:

                 p₁V₁ = p₂V₂

p₁ = Pressure at the beginning [kPa, bar or atm]

V₁ = Volume at the beginning [m³ or cm³]

p₂ = Pressure at the end [kPa, bar or atm]

V₂ = Volume at the end [m³ or cm³]

(Note: can use any units for V and p as long as they are the same at the beginning and end)

 

 

5.19 Boyle's Law demos

	<<Video - mixing colours in a bell jar with Boyle's law.flv>>

Fun with the vacuum pump!

·         Marshmellows

·         Food colouring in pipettes

·         Surgical gloves

 

 

5.19 Ideal graph and conclusion

 

 

5.19 Questions

07 November 2011

14:52

PFY, p.36, Q.1a, 3 and 4

Extension: PFY, p.36, Q.5.

5.  

Part 1:

       p1v1=p2v2 (T is constant)

      2.5atm* 1000 cm cubed= 1 atm*v2

      v2= 2500 cm cubed

Part 2:

      

    Pressure in tyre and pump: 1 atm

    Volume of tyre and pump: 1,100 cm cubed

    Volume of tyre and empty pump: 1,000 cm cubed

    p1v1= p2v2 (T is constant)

    1 atm* 1,100 cm cubed= p2* 1,000 cm cubed

    p2= 1.1 atm