Science Activity
Storyboard Tekst
- Good morning class! For today we will be discussing about  the development of the idea of Boyle’sLaw. Do you have any ideas to share with? 
- Boyle’s LawIt states that the pressure (P) and volume (V) of a confined gas are inversely proportional toone another, given that the temperature (T) of the system is held constant.
- Proportionality expressions have this property. This can be derived by replacing theproportionality symbol with an equal sign and a proportionality constant. Thus,Boyle’s law can be mathematically expressed as P= k(1/V)
- Correct! The relationship between the volume andpressure of gases at constant temperature was firststated by Robert Boyle during the 16th century. Heperformed an experiment wherein he trapped a fixedamount of air in the J-tube, he changed the pressure andcontrolled the temperature and then, he observed itseffect to the volume of the air inside the J-tube. He foundout that as the pressure is increased, the volumedecreases. He finally concluded that the volume of afixed amount of gas is inversely proportional to itspressure at constant temperature.
- Boyle used a J-shaped tube containing mercury, and a gas trapped at the close endof the tube which is under constant atmospheric pressure of 1 atm (or 760 torr).● He then tried increasing the pressure by another 760 torr by adding 760 mm of Hg.The amount of gas trapped then decreased to about half.
- The Soda Can or BottleTypically when we open a bottle of soda, we slowly turn the cap to allow the air to escape before we completely remove the lid. We do this because we've learned over time that twisting it open too fast causes it to fizz up and spill all over. This happens because the liquid is pumped full of carbon dioxide, causing it to bubble up as the CO2 makes its escape.When a soda bottle is filled, it is also pressurized. Much like the aerosol can mentioned earlier, when you slowly open the cap, the gas is able to increase its volume and the pressure decreases. 
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