How do you calculate the pressure of air (Pair)? Barometric Pressure (mm Hg) (1 p.) Ooi...

Question

Question

How do you calculate the pressure of air (Pair)?

Answer 1

Answer #1

The temperature of air should be considered as the room temperature, i.e. T_air = 25 ^oC = 25+273.15 = 298.15 K

The volume of air (V_air) = 10.30 mL or 0.0103 L

The universal gas constant (R) = 0.08206 L.atm/mol.K

According to the ideal gas law: PV = RT (for 1 mole of air)

i.e. P_air * 0.0103 L = 1 mol * 0.08206 L.atm/mol.K * 298.15 K

i.e. P_air = 2375.358 atm = 2375.358*0.1 mm Hg = 237.54 mm Hg

Answer 2

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