Question

Чему равен объем сернистого газа (при н.у.) полученного при обжиге 120кг пирита FeS2, если его выход составляет 80% от теоретически возможного?

Answer 1

120кг                              хм³
4FeS2+11O2=2Fe2O3+8SO2
48г                                 179,2л
х=120*179,2/480=44,8м³ (Vтеор)
Vпракт=Vтеор*η/100%=44,8*80%/100%=35,84м³

Answer 2

Calculating the Volume of Sulfur Dioxide Gas

To calculate the volume of sulfur dioxide gas produced when 120 kg of pyrite (FeS2) is burned, we can use the following steps:

1. Determine the Theoretical Yield of Sulfur Dioxide Gas - The theoretical yield of sulfur dioxide gas can be calculated based on the stoichiometry of the reaction between pyrite and oxygen.

2. Calculate the Actual Yield of Sulfur Dioxide Gas - The actual yield of sulfur dioxide gas can be determined based on the given information that the yield is 80% of the theoretical yield.

3. Use the Ideal Gas Law to Calculate the Volume - Once the actual yield is known, the volume of the gas can be calculated using the ideal gas law equation.

Let's proceed with these calculations based on the provided information.

Theoretical Yield of Sulfur Dioxide Gas

The balanced chemical equation for the reaction between pyrite (FeS2) and oxygen (O2) to produce sulfur dioxide (SO2) is: ``` 4FeS2 + 11O2 → 2Fe2O3 + 8SO2 ``` From the equation, we can see that 4 moles of FeS2 produce 8 moles of SO2.

Calculate the Actual Yield of Sulfur Dioxide Gas

Given that the yield is 80% of the theoretical yield, we can calculate the actual yield of sulfur dioxide gas.

Use the Ideal Gas Law to Calculate the Volume

To calculate the volume of the sulfur dioxide gas produced, we can use the ideal gas law equation: ``` PV = nRT ``` Where: - P = pressure (at standard conditions) - V = volume - n = number of moles of gas - R = ideal gas constant - T = temperature (at standard conditions)

Conclusion

By following these steps, we can calculate the volume of sulfur dioxide gas produced when 120 kg of pyrite is burned, taking into account the 80% yield.