Question

СРОЧНО! В одному з видів бензину масова частка октану становить 84%, а гептану-16%. Спалили 50 кг бензину. Який обєм вуглекислого газу утвориться?​

Answer 1

Ответ:

78,544 m3

Объяснение:

Массы компонентов смеси

m(C8H18)=50*0.84=42 кг

m(C7H16)=50-42=8 кг

Горение по уравнениям

С8H18 + 12,5O2 = 8СO2 + 9H2O

C7H16 + 11O2 = 7CO2 + 8H2O

M(C8H18)=114 г/моль V(CO2)=8n(C8H18)

V1(CO2)=(42/114)*8*22.4 =66 m3

M(C7H16)=100 г/моль V(CO2)=7n(C7H16)

V2(CO2)=(8/100)*7*22.4=12,544 m3

Vs(CO2)=66+12.544=78,544 m3

Answer 2

Calculation of Carbon Dioxide Produced from Burning Gasoline

To calculate the volume of carbon dioxide (CO2) produced from burning 50 kg of gasoline with a mass fraction of 84% octane and 16% heptane, we can use the chemical equation for the combustion of octane, which is a major component of gasoline.

The balanced chemical equation for the combustion of octane is: 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O

From this equation, we can see that 2 moles of octane (C8H18) react with 25 moles of oxygen (O2) to produce 16 moles of carbon dioxide (CO2) and 18 moles of water (H2O).

Calculation Steps

1. Calculate the moles of octane and heptane in 50 kg of gasoline: - Given that the mass fraction of octane is 84% and heptane is 16%, we can calculate the masses of octane and heptane in 50 kg of gasoline.

- Mass of octane = 84% of 50 kg = 0.84 * 50 kg - Mass of heptane = 16% of 50 kg = 0.16 * 50 kg

2. Convert the masses of octane and heptane to moles: - We can then convert the masses of octane and heptane to moles using their respective molar masses.

3. Calculate the moles of CO2 produced: - Using the stoichiometry of the balanced chemical equation, we can calculate the moles of CO2 produced from the moles of octane and heptane.

4. Convert moles of CO2 to volume at standard conditions: - Finally, we can convert the moles of CO2 to volume at standard conditions using the ideal gas law.

Let's calculate the volume of carbon dioxide (CO2) produced from burning 50 kg of gasoline with the given mass fractions of octane and heptane.