Chemistry, asked by shubbaba7, 2 months ago

what is standard pressure​

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Answered by Pharas
1

Answer:

Standard temperature and pressure (STP) are standard sets of conditions for experimental measurements to be established to allow comparisons to be made between different sets of data. The most used standards are those of the International Union of Pure and Applied Chemistry (IUPAC) and the National Institute of Standards and Technology (NIST), although these are not universally accepted standards. Other organizations have established a variety of alternative definitions for their standard reference conditions.

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Answered by gourichakraborty806
1

Answer:

Standard temperature and pressure are standard sets of conditions for experimental measurements to be established to allow comparisons to be made between different sets of data.

Equation

What is STP? STP in chemistry is the abbreviation for Standard Temperature and Pressure. STP most commonly is used when performing calculations on gases, such as gas density and is represented as STP = V*(273/T)*(P/100) or stp = Volume of Gas*(273/Temperature of Gas)*(Pressure of Gas/100).

Measurements

Until 1982, STP was defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 1 atm (101.325 kPa). Since 1982, STP is defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 105 Pa (100 kPa, 1 bar).

Gas constant

STP values are most often cited for gases because their characteristics change dramatically with temperature and pressure. One common definition of STP is a temperature of 273 K (0° Celsius or 32° Fahrenheit) and the standard pressure of 1 atm. Under these conditions, one mole of a gas occupies 22.4 L.

Symbol

It is often useful to refer to a reference pressure, the standard pressure, denoted \(p\st\). The standard pressure has an arbitrary but constant value in any given application.

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