Converting between Units of Pressure Gasses are different from solids and liquid
ID: 514762 • Letter: C
Question
Converting between Units of Pressure Gasses are different from solids and liquids. In a sample of gas, the molecules are far apart. The gas molecules also move around and collide with each other as well as with the walls of the container. These collisions generate pressure. The Pressure of gas can be measured in different units. One convenient unit of measure is called the atmosphere pressure. At sea level, the average pressure is 1 atm. As you get in attitude, the pressure steadily drops until you leave the atmosphere, where the pressure is very close to 0 atm. The table below shows the different commonly used units of measuring gas pressure. Use this table in the pressure unit conversions. Convert 0.950 atm of pressure to its equivalent in millimeters of mercury. Express the pressure numerically in millimeters of mercury. The pressure in car tires is often measured in pounds per square inch (lb/in.^2) with the recommended pressure being in the range of 25 to 45 lb/in.^2. Suppose a tire has a pressure of 41.0 lb/in.^2. Convert 41.0 lb/in.^2 to its equivalent in atmospheres. Express the pressure numerically in atmospheres. High pressure liquid chromography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa) to about 60,000 K Pa (60,000,000 Pa) it is often convenient to know the pressure in torr, if an HPLC procedure it running at a pressure of 4.68 times 10^8 Pa. what is running pressure in torr?Explanation / Answer
(A)
0.950 atm = 0.950 atm * 760 mmHg / atm = 722 mmHg
(B)
41.0 lb/in2. = 41.0 lb/in2. * (1 atm / 14.7 lb/in2.) = 0.0680 atm