A water supply reservoir impounds water principally from melting snow

A water supply reservoir impounds water principally from melting snow (and therefore at 0°C) is

at elevation 1000 m. The water flows by gravity in a closed conduit to a second reservoir at elevation 300

m, where it warms to 10°C. Assume that barometric pressure is 1.0 atm at sea level and decreases by 1%

for every 270 m increase in elevation. How much oxygen will enter or leave each liter of water as it

equilibrates in the lower reservoir? The molar standard (25°C) enthalpy of volatilization for oxygen is

13.3 (kJ/mol). (Note: 1 (kJ) = 9.87 (L.atm)).