Phase Diagram Of Carbon Dioxide

The phase diagram for carbon dioxide. For full table with imperial units rotate the screen.

Consider This Phase Diagram For Carbon Dio Clutch Prep

Water has an unusual phase diagram.

Phase diagram of carbon dioxide. At a temperature of 1975 k 785 o c the vapor pressure of solid carbon dioxide is 1 atm 760 torr. The triple point of carbon dioxide occurs at a pressure of 52 atm 3952 torr and 2166 k 564 o c. The critical temperature for carbon dioxide is 311c and the critical pressure is 73 atm.

The phase diagram of carbon dioxide shows that liquid carbon dioxide cannot exist at atmospheric pressure. Another form of solid carbon dioxide observed at high pressure is an amorphous glass like solid. The triple point of carbon dioxide is about 51 bar 517 kpa at 217 k see phase diagram.

Temperature pressure diagram s a t u r at i o n li ne. The critical point is 738 mpa at 311 c. Carbon dioxide phase diagram.

Most substances have the phase diagram that mimics that of carbon dioxide. However if we examine the phase diagram of water we will find a important difference. Unlike carbon dioxide and most other substances the phase diagram of water shows a negative slope for the boundary line between the liquid and solid state.

That means that at 1 atmosphere pressure carbon dioxide will sublime at a temperature of 78c. It is impossible to get any liquid carbon dioxide at pressures less than 511 atmospheres. Chemical physical and thermal properties of carbon dioxide.

The only thing special about this phase diagram is the position of the triple point which is well above atmospheric pressure. Its melting point decreases with increasing pressure because ice is less dense than liquid water. Thus solid carbon dioxide is called dry ice because it does not go through a liquid state in its phase transition at room pressure.

The phase diagrams of water and carbon dioxide are compared here. Consequently solid carbon dioxide sublimes directly to a gas. Above the critical temperature the fluid is called super critical fluid.

Values are given for gas phase at 25 o c 77 o f 298 k and 1 atm if not other phase temperature or pressure given. Liquid carbon dioxide forms only at pressures above 51 atm.

Phase Diagram Of Carbon Dioxide C11 1 01 05