Imagine your teacher asks you to design an experiment where you test the effect of temperatures on the growth of a plant. You have 5 plants that you plant and place in different temperatures around the room. what would be your variables and what would you constants be.

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.