Convert each measurement to atm. (a) 1277 mm Hg (b) 2.38 ×10^5 Pa (c) 127 psi (d) 455 torr

Name: Problem 23, Chapter 11: Introductory Chemistry
Uploaded: 2020-08-29T09:25:24-08:00
Duration: 2 min 5 s
Channel: Madeline Currie
Description: Convert each measurement to atm. (a) 1277 mm Hg (b) 2.38 ×10^5 Pa (c) 127 psi (d) 455 torr

step 1 This question asks to convert each measurement to atmospheres. So starting with Part A, we have

Convert each measurement to atm. (a) 1277 mm Hg (b) 2.38...

Key Concepts

Pressure Units

Pressure units are various measures used to quantify the force applied per unit area, with common units including atmospheres (atm), millimeters of mercury (mm Hg), Torr, Pascals (Pa), and pounds per square inch (psi). Understanding these units is essential because different scientific and engineering contexts may require the use of distinct measurement systems.

Standard Atmosphere

A standard atmosphere, abbreviated as atm, is a unit of pressure defined as 101,325 Pascals. It serves as a reference value for expressing other pressure measurements and is based on the average atmospheric pressure at sea level. This concept is central in fields such as chemistry, physics, and engineering for calibrating instruments and performing conversions.

Conversion Factors

Conversion factors are numerical multipliers used to change a quantity expressed in one set of units to another without altering its value. In pressure measurements, known equivalences such as 1 atm = 760 mm Hg = 760 Torr = 101,325 Pa allow for accurate interconversion between different units. The accurate application of these factors is critical in ensuring that the scale of measurement remains consistent.

Dimensional Analysis

Dimensional analysis is a technique used to convert one unit into another by multiplying the given quantity by a ratio of conversion factors. This process ensures that units cancel appropriately, validating the conversion. It is a fundamental tool in science and engineering for checking the consistency and correctness of equations and conversions.

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