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,

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