Final answer:
The volume of each balloon at the base is approximately 2.06 L.
Step-by-step explanation:
To find the volume of each balloon at the base, we need to use the combined gas law, which states that the product of the initial pressure, volume, and temperature is equal to the product of the final pressure, volume, and temperature.
Using the information provided:
P1 = 623 mm Hg, V1 = 1.80 L, T1 = -18.0 °C
P2 = 688 mm Hg, V2 = ?, T2 = -13.0 °C
We can solve for V2:
P1 * V1 * T2 = P2 * V2 * T1
Plugging in the values, we get:
(623 mm Hg) * (1.80 L) * (-13.0 °C) = (688 mm Hg) * V2 * (-18.0 °C)
Simplifying the equation, we find that the volume of each balloon at the base is approximately 2.06 L.