Stoichiometry of Reactions Involving Gases

• use molar volumes as conversion factors.

  • at STP: molar volume of any gas is 22.414 L/mol.
  • if not at STP: molar volume of any gas is RT/P.

What volume of SO2(g) is produced at STP by the combustion

of 1 metric ton of coal containing 10 g of sulfur, S8(s)?

Potassium superoxide (KO2) is used to purify air in spacecraft.

What weight of KO2 is required to recycle 1.0 L of CO2 at 25oC

and 1.0 atm?

4 KO2(s) + 2 CO2(g) = 2 K2CO3(s) + 3 O2(g)

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