LAB: Balloon & Flask Lab

Indicate whether the sentence or statement is true or false.


Air molecules can only push, they cannot pull.


The balloon was sucked into the bottle.


We boiled water in the flask only to keep the flask from breaking.


The volume of a gas is INVERSELY related to its temperature.


As the water inside the flask boils, water vapor forces most of the room air molecules out of the flask.


When the flask is removed from the heat and begins to cool, water vapor condenses back into water, thus creating a high pressure environment.


The volume of a gas is DIRECTLY related to its temperature.


Bicycle tires might burst if pumped up to a high pressure and then left out in the hot sun.


When the balloon is attached to the cooling flask, low pressure sucks the balloon inside the flask.


The greater the temperature, the lower the volume of a gas.


When cooled, gases contract in volume.


The lower the temperature the greater the volume of a gas.


The balloon inflated because hot air rises.


The balloon inflated because gases expand when they are heated.


Boiling water created water vapor which takes up 6600 times more volume than water.


Other liquids such as tea, lemonade, or apple juice would NOT have worked just as well in this lab in place of the water we put in the bottom of the flask because they are fundamentally different from water.


When heated, gases expand in volume.

Identify the parts of the lab apparatus.


Alcohol burner




Evaporating water inside the flask


Room temperature gases under normal pressure


Gases expanding in volume when heated
Consider pressure...


low pressure


high pressure formed


high pressure original