Question

Gas pressures can be expressed in units of mm Hg, atm, torr, and kPa. Convert the following pressure values using the unit conversion table in the last page. (20 points, 4 points each) 1. 722 mm Hg to atm 2. 1.25 atm to mm Hg 3. 542 mm Hg to torr 4. 745 mm Hg to kPa 5. 708 kPa to atm

Answer 1

To convert pressure units from mm Hg to atm, atm to mm Hg, mm Hg to torr, mm Hg to kPa, and kPa to atm, you use the standard equivalencies between these units based on 1 atm being equal to 760 mm Hg, 760 torr, and 101.3 kPa.

Step-by-step explanation:

The student's question involves converting pressure units.

To convert 722 mm Hg to atm, use the relationship 1 atm = 760 mm Hg.

So, 722 mm Hg × (1 atm / 760 mm Hg)

= 0.95 atm.

To convert 1.25 atm to mm Hg, use the same relationship but inversely. So, 1.25 atm × (760 mm Hg / 1 atm)

= 950 mm Hg.

Since 542 mm Hg is already a measure of pressure similar to torr, 542 mm Hg = 542 torr directly.

For converting 745 mm Hg to kPa, we use the conversion 101.3 kPa = 760 mm Hg.

So, 745 mm Hg × (101.3 kPa / 760 mm Hg) = 99.12 kPa.

Finally, to convert 708 kPa to atm, we use 1 atm = 101.3 kPa.

Therefore, 708 kPa × (1 atm / 101.3 kPa) = 6.99 atm.

These conversions are helpful in understanding different pressure measurements and in applying them correctly to various chemistry problems.