One type of gas mixture used in anesthesiologyis a 50%/50% mixture (by volume) of nitrous oxide (N2O) and oxygen(O2), which can be premixed and kept in a cylinder for later use.Because these two gases don’t react chemically at or below 2000 psi, attypical room temperatures they form a homogeneous single gas phase,which can be considered an ideal gas. If the temperature drops below-6C, however, N2O may begin to condense out of the gas phase. Thenany gas removed from the cylinder will initially be nearly pure O2; asthe cylinder empties, the proportion of O2 will decrease until the gascoming from the cylinder is nearly pure N2O. In a hospital, pure oxygen may be delivered at 50 psi (gaugepressure) and then mixed with N2O. What volume of oxygen at 20Cand 50 psi (gauge pressure) should be mixed with 1.7 kg of N2O toget a 50%/50% mixture by volume at 20C? (a) 0.21 m3; (b) 0.27 m3;(c) 1.9 m3; (d) 100 m3
One type of gas mixture used in anesthesiology
is a 50%/50% mixture (by volume) of nitrous oxide (N2O) and oxygen
(O2), which can be premixed and kept in a cylinder for later use.
Because these two gases don’t react chemically at or below 2000 psi, at
typical room temperatures they form a homogeneous single gas phase,
which can be considered an ideal gas. If the temperature drops below
-6C, however, N2O may begin to condense out of the gas phase. Then
any gas removed from the cylinder will initially be nearly pure O2; as
the cylinder empties, the proportion of O2 will decrease until the gas
coming from the cylinder is nearly pure N2O. In a hospital, pure oxygen may be delivered at 50 psi (gauge
pressure) and then mixed with N2O. What volume of oxygen at 20C
and 50 psi (gauge pressure) should be mixed with 1.7 kg of N2O to
get a 50%/50% mixture by volume at 20C? (a) 0.21 m3; (b) 0.27 m3;
(c) 1.9 m3; (d) 100 m3
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