The average barometric pressure at an altitude of 10 km is 210 mm Hg. Express this pressure in atmospheres, bars and kilopascals

Answer : The pressure in atmospheres, bars and kilopascals is, 0.276 atm, 0.279 bar and 27.99 kPa respectively.

Explanation :

As we are given that the barometric pressure is, 210 mmHg.

Now we have determine the pressure in atmospheres, bars and kilopascals.

Conversions used for pressure :

1 atm = 760 mmHg

1 atm = 101.325 kilopascals (kPa)

1 atm = 1.01325 bar

First we have to determine the value of pressure in terms of atmosphere.

As, 760 mmHg = 1 atm

So, 210 mmHg =

                         = 0.276 atm

Now we have to determine the value of pressure in terms of bars.

As, 760 mmHg = 1.01325 bar

So, 210 mmHg =

                         = 0.279 bar

Now we have to determine the value of pressure in terms of kilopascals.

As, 760 mmHg = 101.325 kPa

So, 210 mmHg =

                         = 27.99 kPa

Therefore, the pressure in atmospheres, bars and kilopascals is, 0.276 atm, 0.279 bar and 27.99 kPa respectively.