Asubmarine has a "crush depth" (that is, the depth at which water pressure
will crush the submarine) of 250 m. what is the approximate pressure (water
plus atmospheric) at this depth? (recall that the density of seawater is 1025
kg/m3 g = 9.81 m/s2, and 1 kg/(m. s) = 1 pa = 9.8692 x 10-6 atm.)

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?