A weather balloon is similar to a helium party balloon but is designed to rise high into the atmosphere without breaking. As the balloon rises, the air pressure
drops below 101kPa. If it were to reach outer space, where there is essentially
mo air, the air pressure would be OkPa, the lowest possible reading
Suppose you attached a bucket of water at 25°C to a weather balloon and let it
rise to great heights. What would happen to the phase of the water, assuming
the water stayed at 25°C? Use the phase diagram of water from the previous
page to support your answer.
a. When dry ice was placed in a seal bag, the bag filled with gas. Based on
the phase diagram of carbon dioxide, what process is causing the bag to
fill? Use the phase diagram to support your answer.