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 test of the effects of low temperatures on the gas mixture, a cylinder filled at 20.0°C to 2000 psi (gauge pressure) is cooled slowly and the pressure is monitored. What is the expected pressure at -5.00C if the gas remains a homogeneous mixture? (a) 500 psi; (b) 1500 psi; (c) 1830 psi; (d) 1920 psi.
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 test of the effects of low temperatures on the gas mixture, a
cylinder filled at 20.0°C to 2000 psi (gauge pressure) is cooled slowly
and the pressure is monitored. What is the expected pressure at -5.00C
if the gas remains a homogeneous mixture? (a) 500 psi; (b) 1500 psi;
(c) 1830 psi; (d) 1920 psi.
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