Vapor pressure of water by temperature

Name: Vapor pressure of water by temperature
Creator: Unlabeled
License: Original computation by Unlabeled; nothing copied from the source

Water's vapor pressure climbs from 0.61 kPa at freezing to 101.4 kPa at 100 °C, the pressure of the air at sea level: water boils once its vapor pressure matches the air's.

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y ↑: Vapor pressure (kPa)
x →: Temperature (°C)

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The data: 21 points

Temperature (°C)	Vapor pressure (kPa)
0	0.61
5	0.87
10	1.23
15	1.71
20	2.34
25	3.17
30	4.25
35	5.63
40	7.38
45	9.59
50	12.35
55	15.76
60	19.95
65	25.04
70	31.2
75	38.6
80	47.41
85	57.87
90	70.18
95	84.61
100	101.42

Source: Computed: IAPWS-IF97 saturation pressure of water (eq. 30)
Licence: Original computation by Unlabeled; nothing copied from the source
Read: 2026-10-09
Drawn: 21 points as the puzzle showed them · line

Ran in puzzle #16 on October 12, 2026. Play it

Vapor pressure of water by temperature

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