Physical Properties: Changes of State
At atmospheric pressure, acetylene cannot exist as a liquid and does not have a melting point. The triple point on the phase diagram corresponds to the melting point (-80.8°C) at the minimum pressure at which liquid acetylene can exist (1.27 atm). At temperatures below the triple point, solid acetylene can change directly to the vapor (gas) by sublimation. The sublimation point at atmospheric pressure is -84°C.
Read more about this topic: Acetylene
Famous quotes containing the words physical and/or state:
“The price we pay for the complexity of life is too high. When you think of all the effort you have to put in—telephonic, technological and relational—to alter even the slightest bit of behaviour in this strange world we call social life, you are left pining for the straightforwardness of primitive peoples and their physical work.”
—Jean Baudrillard (b. 1929)
“Politics is about putting yourself in a state of grace.”
—Paddy Ashdown (b. 1941)