PROBLEM 23P

Convert each measurement to atm.

(a) 1277 mm Hg

(b) 2.38 × 105 Pa

(c) 127 psi

(d) 455 torr

Solution 23P

Step 1:

(a) 1277 mm Hg

Pressure of gas = 1277 mm Hg

It is known that 1 atm = 760 mm Hg

Conversion factor used = 1 atm/ 760 mm Hg

We have multiply the given pressure of the gas in mmHg with the conversion factor, to calculate the pressure in the atmosphere.

Hence, 1277 mm Hg= 1.680 atm

Therefore the pressure of the gas in atmosphere is 1.680atm

Step 2:

(b) 2.38 × 105 Pa

Pressure of gas = 2.38 × 105 Pa

We will use the conversion factor, to convert the pressure in pa to atm.

pressure in atm = (pressure on Pa) (1 atm/1.01325 x 105 Pa)

= (2.38 × 105 Pa) (1 atm/1.01325 105 Pa)

=2.38 × 105 /1.01325 105 atm ((the Pa unit cancels out)

=2.3488 atm

Therefore the pressure of the gas in atmosphere is 2.3488 atm