An antique copper water heater (closed cylinder) contains 1 mol of water in form of steam at pressure of 39 bar. (a) If the pressure in the heater drops to 35 bar, and the temperature remains constant, how much water must have leaked out of the heater? (mols)
p/np/n (ppressure, nnumber of moles) 39/135/X X1.1142857
