The gas in the piston is being heated, and the piston has moved upward. The observation will be summarized in a row of the incomplete table below.
Row : 1, 2, 3, 4
Name:Boyle’s law, Charles’s law, Gay- lussac’s law, Combined gas law
Observation: Volume increases when pressure decreases, ?, ?, ?
Variables: ?, ?,Temperature, pressure, ?
What are the variables for this piston?
1. temperature only
2. temperature and volume
3. pressure and number of molecules
4. volume and number of molecules