Part B: The pressure in car tires is often measured in pounds per square inch (l

Question

Part B: 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 29.5 lb/in^2. Convert 29.5 lb/in^2 to its equivalent in atmospheres. Express the pressure numerically in atmospheres.
Part C: High-pressure liquid chromatography (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 kPa (60,000,000 Pa). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 4.22 x 10^8 Pa, what is its running pressure in torr? Express the pressure numerically in torr.

Explanation / Answer

B). 14.7 psia =14.7 pounds (lb)/in2 =1atm

29.5 lb/in2= 29.5/14.7 =2.006 atm

c) 760 torr = 1atm = 101.3 Kpa =1.013*105 Pa

1.013*105 pa = 1 atm

4.22*108 Pa=   4.22*108/ 1.013*105 atm=4166 atm

1 atm= 760 torr

4166 atm= 4166*760 Torr=3166160 Torr

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