Question

A self-contained breathing apparatus uses canisters of potassium superoxide, KO2, which consumes
the CO2 exhaled by a person and replaces it with oxygen according to the following reaction:

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

(a) What mass of KO2 in g is required to convert 6.30 L of CO2 at 21.0 oC and 656 mmHg into O2?
Answer _____________________

(b) What is the rms speed of an O2 molecule at -9.4 oC?

Answer 1

4 KO2 (s) + 2 CO2 (g) – 2 kg CO₂ (s) + 3 0₂ (3) If I te tot mol Con = PU RT 656 760 (0.0821) (294K) mol Con= 0.225 mol mol Ko₂ = 2x0.22J = 0.450 mel mand Ko2 = 0.450 X 7.1- 132.0 gm BRT Many - Mans = ) 310 314 4 2535 319.314 X 263.6 32 Mang – 14.33 m/s.