Large plastic syringe (without a needle)Large marshmallowFelt-tip penMaterials 1. Draw a face on one side of the marshmallowandplaceitin the plastic syringe so the face can be seen from the side.2. laceyourthumbo!erthe endofthesyringewherethe needleisusuallylocated. "oldingyourthumbinplace# pushintheplunger.$bser!e whathappenstothe marshmallow as you do so.%. &ith your thumb still in place# pulltheplungeroutand obser!e what happens.rocedure Question:1. Marshmallows have bubbles of air trapped inside. What happened to the marshmallow when you pushed in the plunger? What happened when the plunger was pulled out?Boyles Lawtates that when temperature is held !onstant" the volume of gas is inversely proportional to its pressure# this means that if the pressure in!reases and temperature remains the same the volume de!reases$ressure % is the for!e per unit area&olume%theamountof spa!eo!!upiedby matter1. ' sample of o(ygen gas )*+, has a volume of 1-.-L and a pressure of 1.-atm. What is the new pressure if the volume is de!reased to ..-L?'nitial (onditionFinal (ondition(hange&1 / 1-.-L &+ / ..-L & de!reases$1 / 1.- atm $+ / ? $ must in!rease+. uppose that an 0.-L tan1 !ontain o(ygen at a pressure of 22atm. What pressure does the amount of o(ygen e(ert in a 33L tan1 at the same temperature?'nitial (onditionFinal (ondition(hange&1 / 0.-L &+ / 33L & in!reases$1 / 22 atm $+ / ? $ must de!rease