💨 蒸气压计算器（Antoine 方程，常见液体常数）Vapor Pressure Calculator (Antoine Equation, Common Liquids)

使用说明与常见问题How-to & FAQ

「蒸气压计算器（Antoine 方程，常见液体常数）」是什么？What is the Vapor Pressure Calculator (Antoine Equation, Common Liquids) tool?

用 Antoine 方程 log₁₀P = A − B/(C + T) 计算饱和蒸气压，内置水、乙醇、甲醇、丙酮、苯的常数（mmHg、°C），也可自填常数；结果换算成 mmHg、kPa、atm 和 bar，并提示温度是否超出常数适用范围。本地处理。Calculate the saturation vapor pressure with the Antoine equation log₁₀P = A − B/(C + T). Built-in constants (mmHg, °C) for water, ethanol, methanol, acetone and benzene, or enter your own; results in mmHg, kPa, atm and bar, with a warning when the temperature is outside the constants' valid range. Processed locally.

如何使用「蒸气压计算器（Antoine 方程，常见液体常数）」？How do I use the Vapor Pressure Calculator (Antoine Equation, Common Liquids) tool?

在「蒸气压计算器（Antoine 方程，常见液体常数）」中，填写「物质」、「温度（°C）」、「A」、「B」、「C」等参数，结果会随输入实时计算并显示在下方。In the Vapor Pressure Calculator (Antoine Equation, Common Liquids): Fill in "Substance", "Temperature (°C)", "A", "B", "C"; results are recalculated instantly as you type.

水在 100 °C 的蒸气压是多少？What is the vapor pressure of water at 100 °C?

约 760 mmHg（101.3 kPa，1 atm），这正是水在标准大气压下 100 °C 沸腾的原因。About 760 mmHg (101.3 kPa, 1 atm), which is why water boils at 100 °C at standard pressure.

Antoine 常数从哪里来？Where do the Antoine constants come from?

内置常数取自常用物性手册（如 Dean《Lange 化学手册》），单位为 mmHg 和 °C，只在给定温度范围内有效。The built-in constants are standard handbook values (e.g. Lange's Handbook of Chemistry) in mmHg and °C, valid only in the stated temperature range.

能举个计算实例吗？Can you show a worked example?

例如在「蒸气压计算器（Antoine 方程，常见液体常数）」中填 物质 = 水 1–100 °C，温度（°C） = 100，结果区显示：蒸气压：760.08637 mmHg；kPa：101.33651；atm：1.000114；bar：1.013365；log₁₀P：2.880863；ℹ 常数单位：P 为 mmHg，T 为 °CFor example, entering Substance = Water 1–100 °C, Temperature (°C) = 100 in the Vapor Pressure Calculator (Antoine Equation, Common Liquids) gives: Vapor pressure: 760.08637 mmHg; kPa: 101.33651; atm: 1.000114; bar: 1.013365; log₁₀P: 2.880863; ℹ constants use P in mmHg and T in °C

哪些输入会被检查？Which inputs are validated?

「蒸气压计算器（Antoine 方程，常见液体常数）」会检查这些输入——「温度（°C）」：必须填写，须大于 -273.15且不大于 2,000；「A」：须不小于 -1,000,000且不大于 1,000,000；「B」：须不小于 -1,000,000,000且不大于 1,000,000,000；「C」：须不小于 -1,000,000且不大于 1,000,000；绝对值超过 10¹⁵ 的数也会被拒绝。不符合时结果区显示具体提示，不会给出数字。The Vapor Pressure Calculator (Antoine Equation, Common Liquids) checks its inputs — "Temperature (°C)": required, must be more than -273.15 and at most 2,000; "A": must be at least -1,000,000 and at most 1,000,000; "B": must be at least -1,000,000,000 and at most 1,000,000,000; "C": must be at least -1,000,000 and at most 1,000,000; numbers above 10¹⁵ in absolute value are rejected too. When a value fails, the result area names the problem instead of showing a number.

有哪些选项可以调整？What options can I adjust?

「蒸气压计算器（Antoine 方程，常见液体常数）」的设置：「物质」可选 水 1–100 °C、水 99–374 °C、乙醇、甲醇、丙酮、苯等（默认 水 1–100 °C）；「温度（°C）」默认 100；「A」默认 8.07131；「B」默认 1730.63；「C」默认 233.426。每次生成结果都按当前设置处理。Settings in the Vapor Pressure Calculator (Antoine Equation, Common Liquids) — "Substance": Water 1–100 °C, Water 99–374 °C, Ethanol, Methanol, Acetone, Benzene, etc. (default Water 1–100 °C); "Temperature (°C)" default 100; "A" default 8.07131; "B" default 1730.63; "C" default 233.426. The result always uses the current settings.

计算结果可以用于作业或工程吗？Can I use the results for homework or engineering?

「蒸气压计算器（Antoine 方程，常见液体常数）」使用教科书标准公式（公式写在说明和常见问题中），适合学习和估算核对；涉及安全的工程设计请以规范和实测为准。The Vapor Pressure Calculator (Antoine Equation, Common Liquids) uses standard textbook formulas (given in the description and FAQ), which is good for learning and checking estimates; for safety-critical engineering follow codes and measured values.

「蒸气压计算器（Antoine 方程，常见液体常数）」免费吗？需要注册吗？Is the Vapor Pressure Calculator (Antoine Equation, Common Liquids) free? Do I need an account?

「蒸气压计算器（Antoine 方程，常见液体常数）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Vapor Pressure Calculator (Antoine Equation, Common Liquids) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.