A gas mixture consisting of m1 = 100 g of nitrogen and an unknown amount of oxygen is subjected to isothermal compression at a temperature of T = 74.4 K. A graph of the pressure of the gas mixture versus its volume is shown in Figure 7.8 (in arbitrary units). Determine the mass of oxygen mO2. Calculate the pressure of saturated oxygen vapor pO2 at this temperature. Note. T=74.4 K is the boiling point of liquid nitrogen at normal pressure; oxygen boils at a higher temperature.
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