Glutaric Acid Data

The tables of data for the pure aqueous acid are given below.

(1a) Water Activities from Electrodynamic Balance Measurements

    aW        mfs         m        np    t    uncert.  ref.   weight
  0.8500     0.63136     12.96     1g   25.0   0.01     a      1.0       
  0.0470     1.00000       -       1g   25.0   0.01     a      0.0       
  0.5047     0.99255       -       1g   25.0   0.01     a      0.0       
  0.8195     0.99889       -       1g   25.0   0.01     a      0.0       
  0.8500     0.63136     12.96     2e   25.0   0.01     a      1.0       
  0.1000     1.00000       -       2e   25.0   0.01     a      0.0       
  0.8500     0.63136     12.96     2e   25.0   0.01     a      1.0       
  0.2000     0.99255       -       2e   25.0   0.01     a      0.0       
  0.7105     0.76589     24.76     2e   25.0   0.01     a      1.0       
  0.5667     0.86143     47.06     2e   25.0   0.01     a      1.0       
  0.4918     0.89830     66.86     2e   25.0   0.01     a      1.0       
  0.4341     0.90829     74.97     2e   25.0   0.01     a      1.0       
  0.4008     0.91207     78.52     2e   25.0   0.01     a      1.0       
  0.3319     0.92469     92.94     2e   25.0   0.01     a      1.0       
  0.2245     1.0           -       2e   25.0   0.01     a      0.0       
  0.1818     1.0           -       2g   25.0   0.01     a      0.0       
  0.8869     0.56371      9.78     2g   25.0   0.01     a      1.0       
  0.8710     0.59806     11.26     3e   25.0   0.01     a      1.0       
  0.8657     0.60550     11.62     3e   25.0   0.01     a      1.0       
  0.3576     0.92839     98.13     3e   25.0   0.01     a      1.0       
  0.2166     0.99271       -       3e   25.0   0.01     a      0.0       
  0.8500     0.61989     12.34     3e   25.0   0.01     a      1.0       
  0.8605     0.60336     11.51     3e   25.0   0.01     a      1.0       
  0.7519     0.72732     20.19     3e   25.0   0.01     a      1.0       
  0.8552     0.62330     12.52     3e   25.0   0.01     a      1.0       
  0.5889     0.84514     41.31     3e   25.0   0.01     a      1.0       
  0.3929     0.92473     92.99     3e   25.0   0.01     a      1.0       
  0.8552     0.62330     12.52     3e   25.0   0.01     a      1.0       
  0.2659     1.00000       -       3e   25.0   0.01     a      0 0       
  0.8500     0.63136     12.96     3e   25.0   0.01     a      1.0       
  0.0400     0.99903       -       3e   25.0   0.01     a      0.0       
  0.0770     0.99209       -       3g   25.0   0.01     a      0.0       
  0.8397     0.82674       -       3g   25.0   0.01     a      0.0       
  0.4399     0.98143       -       3g   25.0   0.01     a      0.0       
  0.6723     1.0           -       3g   25.0   0.01     a      0 0       
  0.7383     0.99566       -       3g   25.0   0.01     a      0.0       
  0.8348     0.94358       -       3g   25.0   0.01     a      0.0       
  0.8449     0.64093     13.51     3g   25.0   0.01     a      1.0       
  0.8500     0.63136     12.96     4e   25.0   0.01     a      1.0       
  0.0400     1.0           -       4e   25.0   0.01     a      0.0       
  0.8761     0.61291     11.99     4e   25.0   0.01     a      1.0       
  0.7997     0.69681     17.40     4e   25.0   0.01     a      1.0       
  0.6556     0.82116     34.76     4e   25.0   0.01     a      1.0       
  0.2890     1.0           -       4e   25.0   0.01     a      0 0       
  0.0760     0.99250       -       4g   25.0   0.01     a      0.0       
  0.8500     0.96573       -       4g   25.0   0.01     a      0.0       
  0.8500     0.86738       -       4g   25.0   0.01     a      0.0       
  0.8500     0.85440       -       4g   25.0   0.01     a      0.0       
  0.8500     0.82633       -       4g   25.0   0.01     a      0.0       
  0.8500     0.82140       -       4g   25.0   0.01     a      0.0       
  0.8761     0.60193       -       4g   25.0   0.01     a      0.0       
  0.0400     1.0           -       4g   25.0   0.01     a      0 0       
  0.8761     0.61291       -       4g   25.0   0.01     a      0.0       
  0.8348     0.82204       -       5g   25.0   0.01     a      0.0       
  0.8335     0.78891       -       5g   25.0   0.01     a      0.0       
  0.8346     0.76885       -       5g   25.0   0.01     a      0.0       
  0.8334     0.75749       -       5g   25.0   0.01     a      0.0       
  0.8333     0.66887     15.29     5g   25.0   0.01     a      1.0       
  0.8333     0.66468     15.00     5g   25.0   0.01     a      1.0       
  0.8753     0.58787     10.80     5g   25.0   0.01     a      1.0

Notes and References

Symbols: aW - water activity; mfs - mass fraction of solute in the particle, as given by Peng et al. (2001) and at http://ihome.ust.hk/~keckchan/hygroscopic.html; m - solute molality of the particles (only those particles that appear to be fully aqueous and which were given a non-zero weight); np - particle number (suffix e indicates an evaporation experiment in an atmosphere of decreasing relative humidity, and g particle growth in an atmosphere of increasing relative humidity); t - experimental temperature (^oC); uncert. - probable uncertainty in the water activity; ref. - source of data; weight - the weight assigned in the fit of the model to determine parameter values.
Source: a - C. Peng, M. N. Chan and C. K. Chan (2001) Environ. Sci. Technol. 35, 4495-4501. See also Figure 8 of M. Y. Choi and C. K. Chan (J. Phys. Chem. A 106, 4566-4572, 2002) for some additional measurements.
The uncertainty associated with mfs (and so also the molality m) has three sources: the determination of the dc balancing voltage, solute evaporation, and the standardisation of the particle composition to a single reference state (either dilute solution or solid particle). Based on the scatter in the listed mfs, an overall uncertainty of at least ±0.01 in mfs seems likely. The corresponding values for molality can be obtained using the conversion equation m = (mfs/(1 - mfs)) × (1000/MW) where MW is the molar mass of the acid (132.11 g).

(1b) Osmotic Coefficients from Bulk Solution Measurements

   nS/nW         aW       m          osm       t     uncert.   ref.     weight   
     -           -      0.493       0.9471    25.0   0.034(a)   a        2.0 
     -           -      1.092       0.9110    25.0   0.016(a)   a        2.0 
     -           -      1.416       0.8001    25.0   0.012(a)   a        2.0 
     -           -      2.186       0.7374    25.0   0.008(a)   a        2.0 
     -           -      2.403       0.7159    25.0   0.007(a)   a        2.0 
     -           -      2.880       0.6652    25.0   0.006(a)   a        2.0 
     -           -      3.789       0.6274    25.0   0.005(a)   a        2.0 
     -           -      4.114       0.6277    25.0   0.004(a)   a        2.0 
     -           -     10.80        0.6454    25.0   0.018(b)   b        1.0 
     -           -     11.964       0.6890    25.0   0.016(b)   c        1.0 
     -           -     10.919       0.6847    25.0   0.017(b)   c        1.0 
     -           -      9.088       0.6844    25.0   0.021(b)   c        1.0 
     -           -      7.539       0.6621    25.0   0.024(b)   c        1.0 
     -           -      6.616       0.6632    25.0   0.027(b)   c        1.0 
     -           -      5.889       0.6536    25.0   0.030(b)   c        1.0 
     -           -      4.954       0.6576    25.0   0.036(b)   c        1.0 
     -           -      4.987       0.6179    25.0   0.035(b)   c        1.0 
     -           -      4.422       0.6438    25.0   0.040(b)   c        1.0 
     -           -      4.001       0.6243    25.0   0.040(b)   c        1.0 
     -           -      3.007       0.6578    25.0   0.057(b)   c        1.0 
     -           -      2.472       0.6608    25.0   0.069(b)   c        1.0 
     -           -      1.971       0.6842    25.0   0.087(b)   c        1.0 
     -           -      1.495       0.7125    25.0   0.11(b)    c        1.0 
     -           -      0.9527      0.8215    25.0   0.18(b)    c        1.0 
     -           -      0.4977      0.7834    25.0   0.34(b)    c        1.0 
     -           -      0.2004      1.3881    25.0   0.84(b)    c        0.0 
  0.20712      0.8914     -           -       25.0   0.009(c)   d         -  
  0.20712      0.8868     -           -       25.0   0.009(c)   d         -  
  0.12970      0.9083     -           -       25.0   0.009(c)   d         -  
  0.08540      0.9375     -           -       25.0   0.009(c)   d         -  
  0.04687      0.9724     -           -       25.0   0.009(c)   d         -  
  0.02027      0.9281     -           -       25.0   0.009(c)   d         -  
  0.03055      0.9774     -           -       25.0   0.009(c)   d         -  
  0.00814      0.9863     -           -       25.0   0.009(c)   d         -  
  0.05974      0.9698     -           -       25.0   0.009(c)   d         -  
  0.01197      0.9753     -           -       25.0   0.009(c)   d         -

Notes and References

Symbols: nS/nW - moles of solute per mole of water in the aqueous solution; aW - water activity; m - molality; osm - molal osmotic coefficient; t - experimental temperature (^oC); uncert. - probable uncertainty in the data (see additional note further below); ref. - source of data; weight - the weight assigned in the fit of the model to determine parameter values.
Sources: a - M. Davies and D. K. Thomas (1956) J. Phys. Chem. 60, 41-44; b - C. Marcolli, B. P. Luo and Th. Peter (2004) J. Phys. Chem. A 108, 2216-2224; c - C. Peng, M. N. Chan and C. K. Chan (2001) Environ. Sci. Technol. 35, 4495-4501; d - E. Wise, J. D. Surratt, D. B. Curtis, J. E. Shilling and M. A. Tolbert (2003) J. Geophys. 108, doi:10.1029/2003JD003775, 8 pages.
Uncertainties: (a) in the listed osmotic coefficient osm, based upon ±0.007 mmHg in the measured pressure difference; (b) in the listed osmotic coefficient osm, based upon ±0.003 in the measured water activity aW; (c) in the measured water activity (average of the 0.5% to 1.35% in RH given by Wise et al., 2003).
The original data of Wise et al. (2003), which are not tabulated in their paper, were obtained directly from the authors.