Vapor Pressure Calculator

Vapor pressure is the pressure exerted by a substance’s vapor when in equilibrium with its liquid or solid phase at a specific temperature. It depends on temperature and varies for different substances. Vapor pressure tables provide values at specific temperatures, crucial for applications like chemistry, thermodynamics, and environmental science.

Creating a table of vapor pressures typically involves listing the vapor pressure values of various substances at different temperatures. Vapor pressure is the pressure exerted by a vapor when it is in equilibrium with its liquid or solid phase at a particular temperature. Here’s a simplified example of how you can create a table of vapor pressures:

Substance	Temperature (°C)	Vapor Pressure (mmHg)
Water	0	4.58
	20	17.54
	40	55.32
	60	149.4
	80	355.0
	100	760.0
Ethanol	0	5.95
	20	43.91
	40	103.3
	60	206.0
	80	358.5
	100	582.8
Acetone	0	181.1
	20	315.8
	40	562.2
	60	951.3
	80	1533.2
	100	2430.0

Note that this is just a small sample table, and you can expand it to include more substances and temperatures as needed. Vapor pressure data can be found in various references or databases, and it’s essential to ensure that the values are accurate and consistent for your specific application. Additionally, the units of vapor pressure can vary (e.g., mmHg, kPa, atm), so make sure to use consistent units throughout your table.

FAQs

1. How do you calculate vapor pressure? Vapor pressure can be estimated using equations like the Antoine equation, which uses temperature-specific coefficients for a substance. The Antoine equation is: P = 10^(A – (B / (C + T))), where P is vapor pressure in mmHg, T is temperature in Celsius, and A, B, and C are substance-specific constants.
2. What is the vapor pressure of water at 25 C? The vapor pressure of water at 25°C is approximately 23.76 mmHg.
3. What is the vapour pressure of water at 20 C? The vapor pressure of water at 20°C is approximately 17.54 mmHg.
4. What is the vapor pressure of water at 50 C? The vapor pressure of water at 50°C is approximately 92.52 mmHg.
5. What is vapor pressure for dummies? Vapor pressure is the pressure exerted by a vapor when it is in equilibrium with its liquid or solid phase at a specific temperature. It represents the tendency of a substance to evaporate.
6. What is the normal vapor pressure? The normal vapor pressure is the vapor pressure of a substance at its boiling point under standard atmospheric pressure, which is typically 1 atm (101.3 kPa).
7. What is the vapour pressure of water at 30 C? The vapor pressure of water at 30°C is approximately 31.84 mmHg.
8. What is the vapor pressure of water at 100 C? The vapor pressure of water at 100°C, its boiling point, is approximately 760 mmHg at standard atmospheric pressure.
9. What is water vapour pressure at 60 C? The vapor pressure of water at 60°C is approximately 149.37 mmHg.
10. What is the vapour pressure of water at 40 degrees Celsius? The vapor pressure of water at 40°C is approximately 55.32 mmHg.
11. What is the vapour pressure of water at 22.0 C? The vapor pressure of water at 22.0°C is approximately 19.92 mmHg.
12. What is the vapor pressure of water at 23°C? The vapor pressure of water at 23°C is approximately 21.08 mmHg.
13. What is water vapor pressure at 80 C? The vapor pressure of water at 80°C is approximately 355.82 mmHg.
14. What is the vapor pressure of water at 80 C? The vapor pressure of water at 80°C is approximately 355.82 mmHg.
15. What is the vapour pressure of water at 35 degrees Celsius? The vapor pressure of water at 35°C is approximately 42.17 mmHg.
16. What is considered high vapor pressure? High vapor pressure indicates a substance’s strong tendency to evaporate at a given temperature. It is relative and varies between substances but generally means values above 100 mmHg at room temperature are considered high.
17. What is the difference between air pressure and vapor pressure? Air pressure (atmospheric pressure) is the pressure exerted by the Earth’s atmosphere on everything within it. Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a specific temperature.
18. What is a real-life example of vapor pressure? Boiling water in a covered pot is a real-life example. As the water heats up, its vapor pressure increases until it matches the atmospheric pressure, causing the water to boil and release vapor.
19. At what pressure does water become gas? Water becomes a gas (vapor) when its vapor pressure equals or exceeds the surrounding atmospheric pressure. Typically, this happens at 100°C at sea level (1 atm).
20. At which temperature does water have the highest vapor pressure? Water has its highest vapor pressure at its boiling point, which is 100°C at standard atmospheric pressure (1 atm).
21. What is the vapor pressure of water at 63.5 C? The vapor pressure of water at 63.5°C is approximately 295.72 mmHg.
22. What has the highest vapor pressure at 25 degrees Celsius? At 25°C, among common substances, water has one of the highest vapor pressures.
23. What is the vapor pressure of water at 90 degrees Celsius? The vapor pressure of water at 90°C is approximately 526.47 mmHg.
24. What is the vapor pressure at 10 degrees Celsius? The vapor pressure of water at 10°C is approximately 9.16 mmHg.
25. What is the vapor pressure of water at 70 C? The vapor pressure of water at 70°C is approximately 233.71 mmHg.
26. What is the vapor pressure of pure water at 55 C? The vapor pressure of water at 55°C is approximately 45.36 mmHg.
27. What is the vapor pressure of water at 70 degrees Celsius in kPa? The vapor pressure of water at 70°C is approximately 31.16 kPa.
28. What is the vapour pressure of pure water at 37 C? The vapor pressure of water at 37°C is approximately 47.50 mmHg.
29. What is the vapour pressure of water at 27 degrees Celsius? The vapor pressure of water at 27°C is approximately 31.35 mmHg.
30. What is the vapor pressure of water at 28 degrees Celsius? The vapor pressure of water at 28°C is approximately 33.26 mmHg.
31. Can you have water vapor at 10 degrees Celsius? Yes, you can have water vapor at 10 degrees Celsius. Water can exist as vapor at temperatures below its boiling point.
32. What is the saturated vapour pressure of water at 25 degrees Celsius? The saturated vapor pressure of water at 25 degrees Celsius is approximately 23.76 mmHg.
33. What is the vapour pressure of water at 20 degrees Celsius in bar? The vapor pressure of water at 20 degrees Celsius is approximately 0.0236 bar.
34. What is the critical temperature of vapor pressure? The critical temperature is the temperature above which a substance cannot exist as a liquid, regardless of pressure. For water, the critical temperature is approximately 374°C.
35. How do you calculate vapor pressure from temperature? You can use equations like the Antoine equation, which relates vapor pressure to temperature using substance-specific constants.
36. What is the critical pressure of water vapor? The critical pressure of water is approximately 217.7 atm (22.06 MPa) at its critical temperature.
37. What is the vapor pressure at 100 degrees Celsius? The vapor pressure of water at 100 degrees Celsius, its boiling point at standard atmospheric pressure, is approximately 760 mmHg.
38. What is the vapor pressure of water at 100 degrees Celsius? The vapor pressure of water at 100 degrees Celsius is approximately 760 mmHg.
39. What is the vapour pressure of 100 degrees Celsius water? The vapor pressure of water at 100 degrees Celsius is approximately 760 mmHg.
40. What is the vapour pressure of water at 50 degrees Celsius? The vapor pressure of water at 50 degrees Celsius is approximately 92.52 mmHg.
41. What is the vapor pressure of water at 50 C? The vapor pressure of water at 50°C is approximately 92.52 mmHg.
42. What is the vapor pressure of pure water at 50 C? The vapor pressure of pure water at 50°C is approximately 92.52 mmHg.
43. What is the vapour pressure of water at 40 degrees Celsius? The vapor pressure of water at 40 degrees Celsius is approximately 55.32 mmHg.
44. What is the vapor pressure of water at 80 degrees Celsius? The vapor pressure of water at 80 degrees Celsius is approximately 355.82 mmHg.
45. What is the vapor pressure of water at 30 C? The vapor pressure of water at 30°C is approximately 31.84 mmHg.
46. What is water vapour pressure at 60 C? The vapor pressure of water at 60°C is approximately 149.37 mmHg.
47. What is the vapour pressure of water at 100 C in kPa? The vapor pressure of water at 100°C is approximately 101.3 kPa.
48. What is the vapor pressure of water at 23°C? The vapor pressure of water at 23°C is approximately 21.08 mmHg.
49. What is the vapour pressure of water at 35 C? The vapor pressure of water at 35°C is approximately 42.17 mmHg.
50. What is the vapor pressure of water at 35 degrees Celsius? The vapor pressure of water at 35 degrees Celsius is approximately 42.17 mmHg.
51. When does water turn into water vapor at 100 C? Water turns into water vapor at 100°C when its vapor pressure matches or exceeds the atmospheric pressure.
52. What is the vapour pressure of water at normal temperature? The vapor pressure of water at normal temperature (around 25°C) is approximately 23.76 mmHg.
53. What has the highest vapor pressure at 25 degrees Celsius? Among common substances, at 25°C, water has one of the highest vapor pressures.
54. What is the vapor pressure of water at 63.5 C? The vapor pressure of water at 63.5°C is approximately 295.72 mmHg.
55. What is the vapor pressure of water at 25 C atm? The vapor pressure of water at 25°C is approximately 23.76 mmHg, which is roughly equivalent to 0.0313 atm.
56. What is the vapour pressure of water at 25 degrees Celsius is 18 mm Hg? The vapor pressure of water at 25 degrees Celsius is approximately 23.76 mmHg, not 18 mm Hg.
57. What is the vapour pressure of water at 26 C? The vapor pressure of water at 26°C is approximately 26.54 mmHg.
58. What is the vapor pressure of water at 32 degrees C? The vapor pressure of water at 32°C is approximately 37.71 mmHg.
59. At what temperature does water let off steam? Water starts to release steam (vapor) at its boiling point, which is 100°C at standard atmospheric pressure.
60. Why is vapor at 100 degrees Celsius? At 100°C, water vaporizes because its vapor pressure equals the atmospheric pressure at that temperature, leading to boiling and the formation of steam.
61. Can water exist as a vapor at 25 C and 1 atm? Yes, water can exist as a vapor at 25°C and 1 atm if it has reached its vapor pressure equilibrium at that temperature and pressure.
62. What is the vapour pressure of water at 25 degrees Celsius? The vapor pressure of water at 25 degrees Celsius is approximately 23.76 mmHg.
63. What is the vapor pressure at 25 degrees Celsius? The vapor pressure of water at 25 degrees Celsius is approximately 23.76 mmHg.
64. What is the vapour pressure of water at 20 degrees Celsius is 17.5 for mm? The vapor pressure of water at 20 degrees Celsius is approximately 17.54 mmHg, which is close to the mentioned value.
65. What is the vapour pressure of water at 20 degrees Celsius is 17.5 4 mm? It seems there might be a typo, but assuming you meant 17.54 mmHg, then the answer is the same as above.
66. What is the vapour pressure of water at 80 degree Celsius is 355 mm? The vapor pressure of water at 80 degrees Celsius is approximately 355.82 mmHg.
67. What is the vapour pressure of water at 20 is 17mm? The vapor pressure of water at 20°C is approximately 17.54 mmHg, not 17 mmHg.
68. How do you determine what has the highest vapor pressure? To determine what has the highest vapor pressure, compare the vapor pressure values of different substances at the same temperature. The substance with the highest vapor pressure at that temperature is considered to have the highest vapor pressure.
69. Does lower boiling point mean higher vapor pressure? Yes, generally, a lower boiling point corresponds to a higher vapor pressure at a given temperature. Substances with lower boiling points tend to have higher vapor pressures because they reach their vapor pressure equilibrium at lower temperatures.
70. Does a higher boiling point mean higher vapor pressure? No, a higher boiling point does not necessarily mean higher vapor pressure. In fact, substances with higher boiling points typically have lower vapor pressures at a given temperature.
71. Does higher vapor pressure mean more volatile? Yes, higher vapor pressure indicates greater volatility. A substance with a higher vapor pressure at a specific temperature is more volatile and has a greater tendency to evaporate.
72. Does lower vapor pressure mean more volatile? No, lower vapor pressure means less volatility. A substance with lower vapor pressure at a specific temperature is less volatile and has a weaker tendency to evaporate.
73. Does low vapor pressure mean low boiling point? Not necessarily. Low vapor pressure indicates a lower tendency to evaporate at a given temperature, but it does not directly correlate with the boiling point.