Ethane burns in air to give H₂O and CO₂.

(a) Four gases are involved in this reaction. Place them in order of increasing rms speed. (Assume all are at the same temperature.)
(b) A 3.26-L flask contains C₂H₆ at a pressure of 256 mm Hg and a temperature of 25°C. Suppose O₂ gas is added to the flask until C₂H₆ and O₂ are in the correct stoichiometric ratio for the combustion reaction. At this point, what is the partial pressure of O₂ and what is the total pressure in the flask?

Transcribed Image Text:

2 C₂H6(g) + 7 0₂(g) → 4 CO₂(g) + 6 H₂O(g)