Search results
Results from the WOW.Com Content Network
Values are given in terms of temperature necessary to reach the specified pressure. Valid results within the quoted ranges from most equations are included in the table for comparison. A conversion factor is included into the original first coefficients of the equations to provide the pressure in pascals (CR2: 5.006, SMI: -0.875).
This is illustrated in the vapor pressure chart (see right) that shows graphs of the vapor pressures versus temperatures for a variety of liquids. [7] At the normal boiling point of a liquid, the vapor pressure is equal to the standard atmospheric pressure defined as 1 atmosphere, [1] 760 Torr, 101.325 kPa, or 14.69595 psi.
Vapor pressure of n-butane. From formula: log 10 P m m H g = 6.83029 − 945.90 240.0 + T {\displaystyle \scriptstyle \log _{10}P_{mmHg}=6.83029-{\frac {945.90}{240.0+T}}} obtained from Lange's Handbook of Chemistry , 10th ed.
(760 mmHg = 101.325 kPa = 1.000 atm = normal pressure) This example shows a severe problem caused by using two different sets of coefficients. The described vapor pressure is not continuous—at the normal boiling point the two sets give different results. This causes severe problems for computational techniques which rely on a continuous vapor ...
Vapor pressure of acetone based on formula, = + from Lange's Handbook of Chemistry, 10th ed. vapor pressure of acetone (log scale) based on formula, log 10 P m m H g = 7.02447 − 1161.0 224 + T {\displaystyle \scriptstyle \log _{10}P_{mmHg}=7.02447-{\frac {1161.0}{224+T}}} from Lange's Handbook of Chemistry , 10th ed.
The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the Material Safety Datasheet for this chemical from a reliable source such as SIRI, and follow its directions. MSDS for diethyl ether is available at Mallinckrodt Baker.
log 10 of n-Pentane vapor pressure. Uses formula: log e P m m H g = {\displaystyle \scriptstyle \log _{e}P_{mmHg}=} log e ( 760 101.325 ) − 10.41840 log e ( T + 273.15 ) − 5778.024 T + 273.15 + 81.92460 + 1.178208 × 10 − 5 ( T + 273.15 ) 2 {\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-10.41840\log _{e}(T+273. ...
Phase behavior Triple point: 91 K (−182 °C), 1.1 Pa Critical point: 305.3 K (32.2 °C), 4.9 MPa Std enthalpy change of fusion, Δ fus H o: 9.76 kJ/mol at −182 °C