A gas that exerts a pressure of 15.6 psi in a container with a volume of
L will exert a
pressure
of
25.43 psi when transferred to a
container with a volume of 1.895 L.

V1 = 3.09 L

Explanation:

Initial Pressure, P1 = 15.6 psi

Initial Volume, V1 = ?

Final Pressure, P2 = 25.43 psi

Final Volume, V2 = 1.895 L

The relationship between these quantities is given by boyles law;

V1P1 = V2P2

V1 = V2P2 / P1 = 1.895 * 25.43 / 15.6

V1 = 3.09 L

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.