A mixture was prepared in a 500 mL reaction vessel from 395 mL of (measured at 15.8°C and 800 torr) and 506 mL of (measured at 44.3°C and 1320 torr).

 

The mixture was ignited and the and reacted to form water. What was the final pressure inside the reaction vessel after the reaction was over if the temperature was held at 105°C?

 

P = i ______ atm

 

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Hint                                                          Assistance Used

Start with two pieces of information:

(1) the balanced chemical reaction  

(2) the number of moles of each gas. This will allow you to determine how much water is made in the reaction, what remains, and what the remaining pressures will be in the flask.

Also, review the ideal gas law.

A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures wide and high. The maximum safe pressure inside the vessel has been measured to be . For a certain reaction the vessel may contain up to of sulfur hexafluoride gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction.

A 4.00-g sample of a mixture of CaO and BaO is placed in a 1.00-L vessel containing CO₂ gas at a pressure of 730 torr and a temperature of 25 °C. The CO₂ reacts with the CaO and BaO, forming CaCO₃ and BaCO₃. When the reaction is complete, the pressure of the remaining CO₂ is 150 torr. (a) Calculate the number of moles of CO₂ that have reacted. (b) Calculate the mass percentage of CaO in the mixture.