When the bulb of a constant-volume gas thermometer is placed in a beaker of boiling water at 100 °C, the pressure of the gas is 227 mmHg. When the bulb is moved to an ice-salt mixture, the pressure of the gas drops to 162 mmHg. Assuming ideal behavior, as in Figure 16-3, what is the Celsius temperature of the ice-salt mixture?
Figure 16-3

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Gas 1 Gas 2 Absolute zero.. Gas 3 -Tc -273.15 100 ... is the temperature at which the pressure of any gaswould become zero.