Question

The substance fluorine has the following properties normal melting point 53.5 K normal boiling point85.0 K triple point 1.6*10m, 53.4 K Critical point 55 atm, 144.1 K A sample of fluorine at a pressure of 1.00 am and a temperature of 66.8 K is cooled at constant pressure to a temperature of 49.3 K. Which of the following are true? Choose all that apply One or more phase changes will occur The final state of the substance is a liquid The final state of the substance is a solid The sample is initially a liquid The solid initially present will vaporite

Answer 1

If the sample of fluorine at pressure of 1.00 atm and a temperature of 66.8 k is cooled at constant pressure to a temperature of 49.3K ,the true statements are:

The final state of the substance is Solid.

If the sample of methane initially at a pressure of 55.2 atm and a temperature of 123.3K . The pressure of the sample reduced to 9.20 ×10^-2 atm at a constant temperature of 123.3K , the following is true :

The final state of the sample is a gas.