The substance sulfur dioxide has the following properties normal melting point: 200.4 K normal
boiling point: 263.1 K triple point critical point: 1.7x103 atm, 197.6 K 78 atm, 430.7 K A sample
of sulfur dioxide at a pressure of 1.00 atm and a temperature of 253.6 K is cooled at constant
pressure to a temperature of 194.2 K. w the following are true? Choose all that apply The final
state of the substance is a liquid. One or more phase changes will occur. The final state of the
substance is a solid. The liquid initially present will vaporize. ? The sample is initially a liquid.
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Solution
Options b, c and e.
Below 200.4K the sample is solid. Between 200.4K, and 263.1K the sample is liquid and above
263.1K, it is a gas.
So at 253.6K, the sample is liquid and at 194.2K, it will be solid. So a liquid to solid phase
change will occur.