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The substance sulfur dioxide has the following properties: normal melting point: 200.4 K normal boiling point: 263.1 K triple point: 1.7x10^-3 atm, 197.6 K critical point: 78 atm, 430.7 K A sample of sulfur dioxide is initially at a pressure of 82.5 atm and a temperature of 269.2 K. The pressure on the sample is reduced to 1.70X10^-3 atm at a constant temperature of 269.2 K. Which of the following are true? Choose all that apply.