7. What initial volume of water vapor would have been present at 310 K if the volume now is 360 cm at 541 K?
V1 =
V2=
Law:
P2=
P1=
T1=
T2=

206.3cm³

Explanation:

Given parameters:

Initial temperature  = 310K

Final volume  = 360cm³

Final temperature  = 541K

Unknown:

Initial volume  = ?

Solution:

To solve this problem we apply the Charles's law which states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the pressure is constant".

  Mathematically;

      =

V and T are volume and temperature

1 and 2 are initial and final states

 Insert the parameters and solve for V₁;

                     =  

                    V₁   = 206.3cm³