If a balloon containing 3000ll of gas at 39°c and 99 kpa rises to an altitude where the pressure is 45.5 kpa and the temperature is 16°c, the volume
of the balloon under these new conditions would be calculated using the following conversion factor ratios:

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.