Normal melting point: 63.2 K normal boiling point: 77.4 K triple point: 0.127 atm, 63.1 K...
Normal melting point: 63.2 K normal boiling point: 77.4 K triple point: 0.127 atm, 63.1 K critical point: 33.5 atm, 126.0 K A sample of nitrogen at a pressure of 1.00 atm and a temperature of 115.3 K is cooled at constant pressure to a temperature of 57.0 K. Which of the following are true? Choose all that apply One or more phase changes will occur. The sample is initially a gas. The final state of the substance is a solid. The final state of the substance is a liquid. The solid initially present will vaporize.
Homework Answers
Correct statements are :
(1.) One or more phase changes will occur.
(2.) The sample is initially a gas.
(3.) The final state of the substance is a solid.
Explanation
The given pressure of sample is 1.00 atm which is the pressure at which normal melting point and normal boiling point is measured.
The initial pressure of gas is 115.3 K which is greater than normal boiling point. Hence, initially sample is in gaseous form.
The final pressure of gas is 57.0 K which is less than the normal melting point. Hence, final state of gas is solid form.
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