A liter is defined as a cubic decimeter, or 1000 cubic centimeters (cm3). An inch is 2.54 cm, so 19 in. x 17 in. x 38 in. = 48.26 cm x 43.18 cm x 96.52 cm = 201,134.823536 cm3. Thus, the tank holds approximately 201.135 liters.

P1V1/T1 = P2V2/T2 Change all temps to Kelvin. ( 38 C + 273.15 = 311.15 K and 25 C = 298.15 K ) (1 atm)(20 L)/(298.15 K) = (20 atm)(X L)/(311.15 K) 5963X = 6223 X = 1.0 Liters ===========

there are 28.317 liters per cubic ft 38 X 12 = 456 For every 1 ft of depth (which you didn't supply) there are 12912.552 liters of water, or 28.317 X 456