202004hyvlih0journalOriginalHyvarinen, A.-P.[Antti-P.]Lihavainen, H.[Heikki]Hautio, K.[Kaisa]Raatikainen, T.[Tomi]Viisanen, Y.[Yrjo]Laaksonen, A.[Ari]J. Chem. Eng. Data20042004-10-15Surface Tensions and Densities of Sulfuric Acid + Dimethylamine + Water SolutionsThe surface tensions and densities of aqueous solutions of dimethylamine, (CH3)2NH, and sulfuric acid, H2SO4, were measured at 24.2 C. Mol fractions of dimethylamine were varied between 0 and 0.21 and of sulfuric acid between 0 and 0.48. The surface tension of the binary dimethylamine + water solution decreased exponentially as dimethylamine was added, from the surface tension of water (72 mN.m-1 at 25 C) to the value of 34 mN.m-1 at the maximum dimethylamine mol fraction of 0.21. The surface tension of the ternary system did not change from that of water + sulfuric acid until a sufficient amount of dimethylamine was added to turn the solution alkaline. When the mol fraction of dimethylamine was more than double the mol fraction of sulfuric acid, the surface tension of the solution started to approach that of water + dimethylamine. Polynomial fits were applied to measured data sets of both surface tension and density. Results and fitting parameters are presented.surface tensionsdensitiessulfuric aciddimethylaminewater49917-9221dimethylamineC2H7N1Commercial source1982Estimated by the compiler2waterH2O1Not stated in the document199.994Estimated by the compiler3sulfuric acidH2O4S1Commercial source1962Not known21Principal objective of the workJCEJCE7/19/20041Surface tension liquid-gas, N/mOtherLiquidDirect value, XLiquidAir at 1 atmosphere1Temperature, K129731.07043113121Principal objective of the workSDCTRC7/14/20041Surface tension liquid-gas, N/mOtherLiquidDirect value, XLiquidAir at 1 atmosphereTemperature, K29731Mole fraction3Liquid2Mole fraction1Liquid1002001.070431002.00211.068431002.00311.065731002.00411.065831002.00611.064731002.00811.062831002.0121.061831002.01321.060431002.01621.058431002.02521.056131002.03421.053231002.04321.05131002.05221.049131002.06121.048131002.07121.047831002.09121.042431002.11231.040431002.13531.038931002.15831.036831002.18431.035331002.2131.033731.00112001.071631.00112.00211.071931.00112.00411.06931.00112.00711.064531.00112.01521.059531.00112.02221.056631.00112.0321.052831.00112.03821.051231.00112.08221.045531.00112.13231.039931.00112.18231.034831.00312001.071431.00312.00211.071631.00312.00411.071331.00312.00711.069231.00312.01521.061331.00312.02221.056331.00312.0321.053931.00312.03821.051731.00312.08221.044131.00312.13231.038731.00312.18331.034231.00312.13231.038731.00612001.071231.00612.00211.071431.00612.00411.071631.00612.00711.071631.00612.01521.067331.00612.02221.0631.00612.0321.055831.00612.03821.052931.00612.08221.044631.00612.18931.034631.00612.13131.038731.00612.18931.034631.00812001.071931.00812.00211.071731.00812.00411.071731.00812.00711.071931.00812.01521.072131.00812.0321.058131.00812.03821.054731.00812.04621.050431.00812.08221.045531.00812.13131.038731.00812.18931.034631.02622001.072431.02622.00111.070931.02622.00211.072331.02622.00311.071231.02622.00711.070431.02622.01721.072231.02622.03721.071231.02622.08621.046831.05222001.073131.05222.00111.07331.05222.00211.072731.05222.00311.072231.05222.00411.072931.05222.00711.07331.05222.01821.072931.05222.03821.070331.05222.08921.071531.0922001.07431.0922.00111.073831.0922.00211.074931.0922.00311.073731.0922.00711.074731.0922.01821.074431.0922.03821.074131.0922.08821.072431.12532001.074731.12532.00111.074731.12532.00211.07531.12532.00411.074731.12532.00711.074231.12532.01821.07531.12532.03821.074631.12532.08921.069131.1832001.075231.1832.00111.075231.1832.00211.075231.1832.00311.075531.1832.00711.074931.1832.01721.074731.1832.03621.07431.1832.08421.072431.2532001.073631.2532.00111.073531.2532.00211.073931.2532.00311.072331.2532.00711.072931.2532.01721.070931.2532.03721.070631.3532001.072331.3532.00111.07231.3532.00211.071831.3532.00311.072131.3532.00711.071931.3532.01821.07231.3532.03821.072231.3532.08721.071131.4832001.069431.4832.00111.068531.4832.00211.068331.4832.00411.068831.4832.00711.068231.4832.01721.068331.4832.03721.066831.4832.08721.06753113121Principal objective of the workSDCTRC7/14/20041Mass density, kg/m3Pycnometric methodLiquidDirect value, XLiquidTemperature, K2983Pressure, kPa10031Mole fraction3Liquid2Mole fraction1Liquid1002.0011199831002.0021199431002.0041198831002.0081198731002.0162198431002.0252197431002.0342196931002.0432196731002.0912194131002.1463191831002.213188831.0011200199831.00112.0021199731.00112.0041199431.00112.0071199431.00112.0152199131.00112.0222198531.00112.032198031.00112.0382197431.00112.0822195031.00112.1313192831.00112.1883190131.00312001100541.00312.00211100341.00312.00411100741.00312.00711100141.00312.0152199831.00312.0232199431.00312.032198831.00312.0382198231.00312.0822195731.00312.1323193431.00312.193190531.00612001101741.00612.00211101341.00612.00411101541.00612.00711101141.00612.01521101141.00612.02321100341.00612.0312199931.00612.0392199331.00612.0832196831.00612.1343194331.00612.1933191231.00812001102441.00812.00211101841.00812.00411101941.00812.00711101541.00812.01521101641.00812.02321101641.00812.03121100741.00812.03921100341.00812.0842197431.00812.1353194831.00812.1953191731.02622001108541.02622.00111108441.02622.00211108241.02622.00311108041.02622.00711107141.02622.01721107141.02622.03721106141.02622.08621103941.05222001115641.05222.00111115641.05222.00211115741.05222.00311115641.05222.00711115341.05222.01821114141.05222.03821112741.05222.08921110941.0922001125341.0922.00111125141.0922.00211125341.0922.00411124541.0922.00711124541.0922.01421123541.0922.03821121641.0922.08821118441.12532001132841.12532.00111133341.12532.00211132941.12532.00311133141.12532.00711131641.12532.01421131241.12532.03821128941.12532.08921125841.1832001142241.1832.00111142741.1832.00211142541.1832.00311142141.1832.00711141341.1832.01721140241.1832.03621137841.1832.08421133741.2532001152841.2532.00111152541.2532.00211152741.2532.00411151641.2532.00711151341.2532.01821149841.2532.03721147841.2532.08621142841.3532001162241.3532.00111163241.3532.00211163641.3532.00311162541.3532.00711162541.3532.01821160841.3532.03821159141.3532.08721153241.4832001172541.4832.00111174841.4832.00211174241.4832.00311173441.4832.00711172741.4832.01721172241.4832.03721170941.4832.08621161141121Principal objective of the workSDCTRC7/14/20041Mass density, kg/m3Pycnometric methodLiquidDirect value, XLiquid1Mole fraction1Liquid2Temperature, K3Pressure, kPa1.00112298.15331003199831.00212298.15331003199431.00412298.15331003198831.00812298.15331003198731.01622298.15331003198431.02522298.15331003197431.03422298.15331003196931.04322298.15331003196731.09122298.15331003194131.14632298.15331003191831.2132298.15331003188831.00112571.15331003199831.00212571.15331003199431.00412571.15331003198831.00812571.15331003198731.01622571.15331003198431.02522571.15331003197431.03422571.15331003196931.04322571.15331003196731.09122571.15331003194131.14632571.15331003191831.2132571.15331003188831121Principal objective of the workJCEJCE7/20/20041Surface tension liquid-gas, N/mOtherLiquidDirect value, XLiquidAir at 1 atmosphere1Mole fraction1Liquid2Temperature, K1.0021229731.068431.0031229731.065731.0041229731.065831.0061229731.064731.0081229731.062831.012229731.061831.0132229731.060431.0162229731.058431.0252229731.056131.0342229731.053231.0432229731.05131.0522229731.049131.0612229731.048131.0712229731.047831.0912229731.042431.1123229731.040431.1353229731.038931.1583229731.036831.1843229731.035331.213229731.033733121Principal objective of the workSDCTRC7/14/20041Mass density, kg/m3Pycnometric methodLiquidDirect value, XLiquid1Mole fraction3Liquid2Temperature, K3Pressure, kPa1.00112298.15331003199831.00312298.153310031100541.00612298.153310031101741.00812298.153310031102441.02622298.153310031108541.05222298.153310031115641.0922298.153310031125341.12532298.153310031132841.1832298.153310031142241.2532298.153310031152841.3532298.153310031162241.4832298.153310031172541.00112571.15331003199831.00312571.153310031100541.00612571.153310031101741.00812571.153310031102441.02622571.153310031108541.05222571.153310031115641.0922571.153310031125341.12532571.153310031132841.1832571.153310031142241.2532571.153310031152841.3532571.153310031162241.4832571.153310031172543121Principal objective of the workJCEJCE7/20/20041Surface tension liquid-gas, N/mOtherLiquidDirect value, XLiquidAir at 1 atmosphere1Mole fraction3Liquid2Temperature, K1.0011229731.071631.0031229731.071431.0061229731.071231.0081229731.071931.0262229731.072431.0522229731.073131.092229731.07431.1253229731.074731.183229731.075231.253229731.073631.353229731.072331.483229731.06943