Boyle’s law
Students were sent the following video https://www.youtube.com/watch?v=Xto88gMmDzw
on Boyle’s Law, and were asked to note down the points based on their understanding.
Teacher : starts the class by showing a syringe .
All of you know what is this ….
Students: Yes Miss. It is a Syringe used in clinics.
Teacher ( draws the simple diagram of a syringe- in both the positions)
Position one with more volume,
Position two with less volume
Students find out from the 2 positions that, when Volume increases, Pressure decreases and vice versa.
Teacher : How many of you have tasted coke?
Students raises their hands those who have tasted it.
Teacher: Do you open & drink it as you do with your water bottle?
Students: No miss,
Teacher: Then whats the difference?
Students: We shake it & open very slowly
Teacher: Why do you open very slowly?
What will happen if you open like you do your waterbottle
Students: The fizz comes out and can spill out
Teacher : What do you think is that fizz, and how is it caused?
Students: Maybe due to CO2 filled in it.
Teacher: When a soda bottle is filled, it is also pressurized. when you slowly open the cap, the gas is
able to increase its volume and the pressure decreases. Or else,….
Students fill in what happens…
Teacher: Why is the tyres of the vehicles checked for proper air pressure?
do you think its essential to fill in the tyres with proper amount of air?
Students: for smooth driving, etc…
Students deduce that when volume increases ,pressure decreases.
Teacher shows the relation .. P1V1=P2V2 from the above 2 examples
Students are asked to open the simulation
and do the change in volume,keeping temperature constant.
They record the values in their notebook and conclude that P1V1=P2V2