Ch.6 - Gases

Tro - Chemistry: A Molecular Approach 6th Edition

Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Not the one you use?Change textbook

Tro 6th Edition

Ch.6 - Gases

Problem 25d

Chapter 6, Problem 25d

The pressure in Denver, Colorado (elevation 5280 ft), averages about 24.9 in Hg. Convert this pressure to each indicated unit. d. Pa

Verified step by step guidance

Start by understanding the units involved: 1 inch of mercury (in Hg) is a unit of pressure commonly used in meteorology and aviation. We need to convert this to Pascals (Pa), which is the SI unit for pressure.

Use the conversion factor: 1 in Hg = 3386.39 Pa. This conversion factor is derived from the density of mercury and the acceleration due to gravity.

Multiply the given pressure in inches of mercury by the conversion factor to convert it to Pascals. So, calculate 24.9 in Hg * 3386.39 Pa/in Hg.

Ensure that the units cancel out correctly, leaving you with the pressure in Pascals.

The result from the multiplication will give you the pressure in Pascals.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Pressure Units

Pressure is a measure of force applied per unit area and can be expressed in various units, including inches of mercury (in Hg), pascals (Pa), and atmospheres (atm). Understanding how to convert between these units is essential for solving pressure-related problems in chemistry and physics.

Conversion Factors

Conversion factors are ratios that express how many of one unit are equal to another unit. For example, 1 in Hg is equivalent to 3,386.39 Pa. Using these factors allows for the accurate transformation of measurements from one unit to another, which is crucial in calculations involving pressure.

Atmospheric Pressure

Atmospheric pressure is the pressure exerted by the weight of the atmosphere above a given point. At sea level, standard atmospheric pressure is defined as 101,325 Pa or 760 mm Hg. Understanding how elevation affects atmospheric pressure is important, as higher altitudes, like Denver, experience lower pressure due to the reduced weight of the air above.

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Textbook Question

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Textbook Question

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