A balloon is filled with 3.50 L of water at 24°C and 2.27 atm. The balloon in the figure is placed outside on a hot day. What is the volume of the balloon, assuming constant pressure?
The volume of the balloon is 3.51 L.
At first glance, this appears to be an Ideal Gas Law problem.
However, water is a liquid at 24 °C and 2.27 atm.
For argument's sake, let's say that the temperature on a hot summer day is 34 °C.
Water is essentially incompressible, but its thermal expansion may be significant.
The thermal volume coefficient (β) of water is 0.000 207/°C from 20 °C to 30 °C and 0.000 303/°C from 30°C to 40 °C.
At 30 °C,
At 34 °C,
The volume on a hot summer day is 3.51 L.