The discussion revolves around calculating pressure in a chemical reaction using the Ideal Gas Law, specifically in the context of a reaction involving sulfur dioxide (SO2) and oxygen (O2) to produce sulfur trioxide (SO3). Participants are examining the stoichiometry of the reaction and its implications for the number of moles of gas present after the reaction.
The discussion is active, with participants clarifying their understanding of limiting reagents and the implications for the final moles of gas. Some guidance has been offered regarding the relationship between the reactants and products, but there is no explicit consensus yet on the correct interpretation of the moles involved.
Participants are working under the constraints of a homework problem, which may limit the information available for discussion. The original poster expresses uncertainty about the interpretation of the coefficients in the balanced reaction.
2 SO2 +O2 --> 2 SO3
A mixture of gases containing 0.20 mol of SO2 and 0.2 mol of O2 in a 4.0 L flask reacts to form SO3. If the temperature is 25ºC, what is the pressure in the flask after reaction is complete?