Take-home Practice Problems: gases part 2 25 cart 02 2503 When sulfur dioxide ga

Question

Take-home Practice Problems: gases part 2 25 cart 02 2503 When sulfur dioxide gas reacts with oxygen gas, sulfur trioxide gas forms. If 3.5 mol of sulfur trioxide are produced, how many moles of oxygen gas reacted? 1. 2 mdsun lf 16L of sulfur trioxide are collected, how many liters of oxygen were reacted. assuming the pressure and temperature are constant? b· If 4.5L of oxygen react with 6.0L of sulfur dioxide, how many L of sulfur trioxide will form, assuming the pressure and temperature are constant? c. 2. If a container holds a mixture of nitrogen at 1100 torr and hydrogen at 0.45atm, what is the total pressure inside the container? 7o0 terr n is collected over water at 29 °C and 1.25 atm, what is the partial pressure of 3. If argo argon? 4. If 8.50 moles of helium gas occupies a volume of 25.OL at 28 °C, what is the pressure of the gas?

Explanation / Answer

1C)

2SO2 + O2 -----------------> 2SO3

2 L         1 L                          2 L

6.0 L      4.5 L

limiting reagent is SO2 because volume ration 6/2 = 3 lesser than 4.5 /1 =4.5 . product based on limiting reagent

so

volume of SO3 produced = 6.0 L

2)

N2 pressure = 1100 torr = 1.45 atm

H2 pressure = 0.45 atm

total pressure = 1.45 + 0.45

                       = 1.90 atm

3)

partial pressure of Ar = total pressure - water vapour pressure

                                  = 1.25 - 0.0395

                                 = 1.21 atm

4)

P V = n R T

P x 25 = 8.50 x 0.0821 x 301

P = 8.40 atm

pressure of gas = 8.40 atm

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