If methane gas was kept in a 3.00 L container at STP, what would the pressure
be at 3.2 L?

Given

P1 = 1 Atm ( at stp)

V1 = 3.00 L

V2 = 3.20 L

P2 = ?

We know that,

at constant temperature

P1V1 = P2V2

1 × 3 = 3.2 × P2

P2 = 3/3.2

P2 = 0.9375 Atm

pressure at 3.2 L is 0.9375 Atm.

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it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.