Question

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

Answer 1

B) Temperature and volume

Step-by-step explanation:

Answer 2

Given that the gas is enclosed you know that the number of moles does not change.

Assuming that the piston moves freely, you infere the pressure is constant.

The voume is evidently variable.

Temperature tends to decrease when the gases expands.

Therefore, there are two variables: the volumen and the temperature.

Answser: option 2: temperature and volume.