毫米汞柱 （英語： Millimeter of mercury），符號為 mmHg，是一種 压强 單位，舊定義：一 毫米 高的 水銀 柱對液柱底面產生的压强，現在定義：一毫米汞柱為133.322387415 帕斯卡，約為1 托 [1] 。 虽然毫米汞柱不是 国际标准单位，但仍应用在气象、航空和诸多科学领域。 粗略来说 1mmHg ≈ 1 760 atm （101 325 760 ≈ 133.322 368 帕斯卡），尽管两个单位并不相等，但是相对差只有 0.000015%，对大多数应用场景来说可以忽略不计。 ^ Conventional millimetres of …

2020年4月14日 · Pressure can be measured in $\pu{mmHg}$ which is equal to the pressure exerted by a “column of mercury” of a height expressed in $\pu{mm},$ at $\pu{0 °C}$ under Earth’s normal gravity. Does the diameter of a tube that contains the mercury affect how high the mercury will rise?

mmHg is a unit of pressure defined as the pressure exerted by a column of mercury one millimeter high. The term mmHg stands for millimeters of mercury, a unit that has its roots in the early days of barometry and medicine.

2025年1月5日 · In the world of chemistry, millimeters of mercury (mmHg) is a unit of pressure measurement, commonly used to express the pressure of a gas or substance in a container. In this article, we will delve into the meaning and applications of mmHg in chemistry, exploring its significance, advantages, and limitations.

2023年1月30日 · Ideal gases are essentially point masses moving in constant, random, straight-line motion. Its behavior is described by the assumptions listed in the Kinetic-Molecular Theory of Gases. This definition of an ideal gas contrasts with the Non-Ideal Gas definition, because this equation represents how gas actually behaves in reality.

Discover the essentials of millimeter-of-mercury (mmHg) – how it works, why it matters, and its global significance.

2023年6月25日 · The partial pressure of a gas is the pressure that gas would exert if it occupied the container by itself. Partial pressure is represented by a lowercase letter p. Dalton’s law of partial pressures is most commonly encountered when a gas is collected by displacement of water, as shown in Figure 2.

mmHg, or millimeters of mercury, is a unit of pressure commonly used in various scientific contexts, especially in relation to gases. It is defined as the pressure exerted by a column of mercury 1 millimeter high at the standard acceleration due to gravity.

2025年3月14日 · One unit of gas pressure is the millimeter of mercury (mm Hg) (mm Hg). An equivalent unit to the mm Hg mm Hg is called the torr torr, in honor of the inventor of the barometer, Evangelista Torricelli. The pascal (Pa) (Pa) is the standard unit of pressure.

mmHg, or millimeters of mercury, is a unit of pressure used to quantify the pressure exerted by gases, particularly in the context of gas exchange across respiratory surfaces. This measurement is crucial for understanding how gases like oxygen and carbon dioxide diffuse in the lungs and tissues, as it reflects the partial pressures that drive ...