Question

What is the mass of 187 liters of CO2 gas? The volume is measured at STP.

Answer 1

The mass of 187 liters of CO2 gas is 0.36 g.

Explanation:

The molecular weight of CO2 is 44 g / mol.

1 kg of CO2 = 1000 g $\times$ ( 1 mole / 44 g) = 22.7 mole of CO2.

By using the ideal gas equation,

                                    PV = nRT

                                      V = nRT / P

where P represents the pressure,

          V represents the volume,

          T represents the temperature,

          R represents the ideal gas constant,

          n represents the amount of substance.

                                   V = (22.7)$\times$(0.0821)$\times$(273.15) / 1

                                   V = 509.6 L of CO2 at STP

            Mass = (187 L of CO2 gas) / (509.6 L of CO2 at STP)

                       = 187 / 509.6

            mass = 0.36 g