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Phase behavior Triple point: 178.5 K (−94.3 °C), ? Pa Critical point: 508 K (235 °C), 48 bar Std enthalpy change of fusion, Δ fus H o +5.7 kJ/mol Std entropy change
The Preliminary SAT/National Merit Scholarship Qualifying Test (PSAT/NMSQT) is a standardized test administered by the College Board and cosponsored by the National Merit Scholarship Corporation (NMSC) in the United States. In the 2018–2019 school year, 2.27 million high school sophomores and 1.74 million high school juniors took the PSAT. [1]
The Antoine equation is = +. where p is the vapor pressure, T is temperature (in °C or in K according to the value of C) and A, B and C are component-specific constants.. The simplified form with C set to zero:
Phase behavior Density (liquid) 0 °C : 600 kg/m³ Density (saturated vapor) 1 atm, -0.5 °C : 2.6 kg/m³ Triple point: 134.6 K (–138.5 °C), 0.7 Pa Critical point: 425.1 K (152.0 °C), 3796.0 kPa
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Phase behavior Triple point: 178.15 K (−94.99 °C), ? Pa Critical point: 591.79 K (318.64 °C), 4.109 MPa Std enthalpy change of fusionΔ fus H o: 6.636 kJ/mol
Phase behavior Triple point: 156.92 K (–116.23 °C), ? Pa Critical point: 467 K (194 °C), 3600 kPa Std enthalpy change of fusion, Δ fus H o: 7.19 kJ/mol Std entropy change
Phase behavior Triple point: 178.0 K (–95.1 °C), 1.23 Pa Critical point: 507.6 K (234.5 °C), 3020 kPa Std enthalpy change of fusion, Δ fus H o: 13 kJ/mol