Skip to ContentGo to accessibility pageKeyboard shortcuts menu
OpenStax Logo
Chemistry

E | Water Properties

ChemistryE | Water Properties
Water Density (kg/m3) at Different Temperatures (°C)
Temperature1 Density
0 999.8395
4 999.9720 (density maximum)
10 999.7026
15 999.1026
20 998.2071
22 997.7735
25 997.0479
30 995.6502
40 992.2
60 983.2
80 971.8
100 958.4
Table E1
A line graph is titled “Density of Water as a Function of Temperature.” The x-axis is titled “Temperature, degrees Celsius,” and the y-axis is titled “Density, Kilograms per cubic meter.” A line connects plot points at the coordinates 0 and 999.8395, 4 and 999.9720, 10 and 999.7026, 15 and 999.1026, 20 and 998.2071, 22 and 997.7735, 25 and 997.0479, 30 and 995.6502, 40 and 992.2, 60 and 983.2, 80 and 971.8, and 100 and 958.4.
Water Vapor Pressure at Different Temperatures (°C)
Temperature Vapor Pressure (torr) Vapor Pressure (Pa)
0 4.6 613.2812
4 6.1 813.2642
10 9.2 1226.562
15 12.8 1706.522
20 17.5 2333.135
22 19.8 2639.776
25 23.8 3173.064
30 31.8 4239.64
35 42.2 5626.188
40 55.3 7372.707
45 71.9 9585.852
50 92.5 12332.29
55 118.0 15732
60 149.4 19918.31
65 187.5 24997.88
70 233.7 31157.35
75 289.1 38543.39
80 355.1 47342.64
85 433.6 57808.42
90 525.8 70100.71
95 633.9 84512.82
100 760.0 101324.7
Table E2
A line graph is titled “Vapor Pressure as a Function of Temperature.” The x-axis is titled “Temperature, degrees Celsius,” and the y-axis is titled “Vapor pressure, torr.” A line connects plot points at the coordinates 0 and 4.6, 4 and 6.1, 10 and 9.2, 15 and 12.8, 20 and 17.5, 22 and 19.8, 25 and 23.8, 30 and 31.8, 35 and 42.2, 40 and 55.3, 45 and 71.9, 50 and 92.5, 55 and 118.0, 60 and 149.4, 65 and 187.5, 70 and 233.7, 75 and 289.1, 80 and 355.1, 85 and 433.6, 90 and 525.8, 95 and 633.9, and 100 and 760.0.
Water Kw and pKw at Different Temperatures (°C)
Temperature Kw 10–14 pKw2
0 0.112 14.95
5 0.182 14.74
10 0.288 14.54
15 0.465 14.33
20 0.671 14.17
25 0.991 14.00
30 1.432 13.84
35 2.042 13.69
40 2.851 13.55
45 3.917 13.41
50 5.297 13.28
55 7.080 13.15
60 9.311 13.03
75 19.95 12.70
100 56.23 12.25
Table E3
A line graph is titled “Water pK subscript W as a Function of Temperature.” The x-axis is titled “Temperature, degrees Celsius,” and the y-axis is titled “pK subscript W.” A line connects plot points at the coordinates 0 and 14.95, 5 and 14.74, 10 and 14.54, 15 and 14.33, 20 and 14.17, 25 and 14, 30 and 13.84, 35 and 13.69, 40 and 13.55, 45 and 13.41, 50 and 13.28, 55 and 13.15, 60 and 13.03, 75 and 12.7, and 100 and 12.25.
Specific Heat Capacity for Water
C°(H2O(l)) = 4184 J∙K−1∙kg−1 = 4.184 J∙g-1∙°C-1
C°(H2O(s)) = 1864 J∙K−1∙kg−1
C°(H2O(g)) = 2093 J∙K−1∙kg−1
Table E4
Standard Water Melting and Boiling Temperatures and Enthalpies of the Transitions
Temperature (K) ΔH (kJ/mol)
melting 273.15 6.088
boiling 373.15 40.656 (44.016 at 298 K)
Table E5
Water Cryoscopic (Freezing Point Depression) and Ebullioscopic (Boiling Point Elevation) Constants
Kf = 1.86°C∙kg∙mol−1 (cryoscopic constant)
Kb = 0.51°C∙kg∙mol−1 (ebullioscopic constant)
Table E6
A line graph is titled “Water Full-Range Spectral Absorption Curve.” The x-axis is titled “Wavelength” and the y-axis is titled “Absorption ( 1 per meter ).” Evenly spaced tick marks on the x-axis denote 10 nanometers, 100 nanometers, 1 micrometer, 10 micrometers, 100 micrometers, 1 millimeter, and 10 millimeters. Evenly spaced tick marks on the y-axis denote 10 superscript negative two, 10 superscript negative one, 10 superscript zero, 10 superscript one, 10 superscript two, 10 superscript three, 10 superscript four, 10 superscript five, 10 superscript six, 10 superscript seven, and 10 superscript eight. Above the graph, horizontal lines indicate the range of wavelengths for U V, V I S, near I R , mid I R , far I R , and E H F. The graph contains one line that begins at 10 nanometers and a little more than 10 superscript six. Moving from left to right, this line ascends gradually until it reaches a point near 100 nanometers and 10 superscript eight. From this point, the line steeply descends to a point a little more than halfway between 100 nanometers and 1 micrometer, and slightly more than 10 superscript two. This point indicates the end of the range labeled “U V” and the beginning of the range labeled “V I S.” The range labeled “V I S” is shaded with a color spectrum including the full range of Roy G Biv colors. Here, the line briefly descends in the same path as before, and then steeply ascends to a point near 1 micrometer and 10 superscript zero. This point indicates the end of the range labeled “V I S” and the beginning of the range labeled “near I R.” The line continues its steep ascent, with short, abrupt descents in between, until it reaches a point a little more than halfway between 1 micrometer and 10 micrometers, and a little more than 10 superscript six. This point indicates the end of the range labeled “near I R” and the beginning of the range labeled “mid I R.” Here, the line moves steeply and sporadically up and down until it reaches a point a little more than halfway between 10 micrometers and 100 micrometers, and slightly more than 10 superscript five. This point indicates the end of the range labeled “Mid I R” and the beginning of the range labeled “Far I R.” The line descends very gradually to a point slightly more than 1 millimeter and slightly more than 10 superscript four. This point indicates the end of the range labeled “Far I R” and the beginning of the range labeled “E H F.” The line continues its gradual descent to 10 millimeters and slightly more than 10 superscript three. This point indicates the end of the range labeled “E H F.”
Figure E1 Water full-range spectral absorption curve. This curve shows the full-range spectral absorption for water. The y-axis signifies the absorption in 1/cm. If we divide 1 by this value, we will obtain the length of the path (in cm) after which the intensity of a light beam passing through water decays by a factor of the base of the natural logarithm e (e = 2.718281828).

Footnotes

  • 1Data for t < 0 °C are for supercooled water
  • 2pKw = –log10(Kw)
PreviousNext
Order a print copy
Citation/Attribution

This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission.

Want to cite, share, or modify this book? This book uses the Creative Commons Attribution License and you must attribute OpenStax.

Attribution information
  • If you are redistributing all or part of this book in a print format, then you must include on every physical page the following attribution:
    Access for free at https://openstax.org/books/chemistry/pages/1-introduction
  • If you are redistributing all or part of this book in a digital format, then you must include on every digital page view the following attribution:
    Access for free at https://openstax.org/books/chemistry/pages/1-introduction
Citation information

© Feb 15, 2022 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.