A liquid has a vapor pressure of 159 mm Hg at 20°C and 165 mm Hg at 30°C. Different amounts of the liquid are added to three identical evacuated steel tanks kept at 20°C. The tanks are all fitted with pressure gauges. For each part, write
L/G if both liquid and gas are present.
G if only gas is present.
I if the situation is impossible.
(a) The pressure gauge in Flask I registers a pressure of 256 mm Hg.
(b) The pressure gauge in Flask II registers a pressure of 135 mm Hg.
(c) The pressure gauge in Flask III registers a pressure of 165 mm Hg at 30°C. The temperature is lowered to 20°C, and the gauge registers a pressure of 159 mm Hg.
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