Question

3. Какой объем углекислого газа (н.у.) образуется при спиртовом брожении глюкозы массой 500 г, содержащей 4% примесей, если выход продукта составляет 72%?

Answer 1

Как-то так
Ответ: 86 литров

Answer 2

Calculating the Volume of Carbon Dioxide Produced in the Fermentation of Glucose

To calculate the volume of carbon dioxide (at standard temperature and pressure) produced during the fermentation of glucose, we can use the following steps:

1. Calculate the moles of glucose: - The mass of glucose is given as 500 g, with 4% impurities. - Calculate the actual mass of pure glucose.

2. Determine the moles of carbon dioxide produced: - Use the stoichiometry of the fermentation reaction to find the moles of carbon dioxide produced from the moles of glucose.

3. Convert moles to volume: - Use the ideal gas law to convert moles of carbon dioxide to volume at standard temperature and pressure.

Let's proceed with these calculations step by step.

Step 1: Calculate the Moles of Glucose

The mass of pure glucose can be calculated as follows: \[ \text{Mass of pure glucose} = \text{Total mass of glucose} - \text{Mass of impurities} \]

\[ \text{Mass of pure glucose} = 500 \, \text{g} - (4\% \times 500 \, \text{g}) \]

\[ \text{Mass of pure glucose} = 500 \, \text{g} - 20 \, \text{g} = 480 \, \text{g} \]

Step 2: Determine the Moles of Carbon Dioxide Produced

The balanced chemical equation for the fermentation of glucose is: \[ C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2 \]

From the balanced equation, we can see that 1 mole of glucose produces 2 moles of carbon dioxide.

Step 3: Convert Moles to Volume

Using the ideal gas law, the volume of carbon dioxide at standard temperature and pressure (STP) can be calculated as: \[ \text{Volume} = \frac{n \times R \times T}{P} \]

Where: - \( n \) = moles of carbon dioxide - \( R \) = ideal gas constant - \( T \) = temperature in Kelvin (273.15 K at STP) - \( P \) = pressure in atmospheres (1 atm at STP)

Let's calculate the volume of carbon dioxide produced using the given information.

Conclusion

By following these steps, you can calculate the volume of carbon dioxide (at standard temperature and pressure) produced during the fermentation of glucose.