Question

Газовая смесь состоит из оксида и диоксида азота. Вы¬числите объемные доли газов в смеси, если парциаль¬ные давления газов соответственно равны 39 990 и 66 650 Па.

Answer 1

Отношение парциального давления какого-то газа Х к давлению смеси = его мольной доле в этой смеси и = его объемной доли в смеси
Считаем объемную долю оксида азота
$\varphi(NO) = \dfrac{P(NO)}{P} = \dfrac{n(NO)}{n} = \dfrac{V(NO)}{V} = \dfrac{39990}{39990 + 66650} = 0.375 \; (37.5\%)$
Ну, а другой компонент посчитать уже не сложно

Answer 2

Calculation of Volume Fractions of Gases in a Mixture

To calculate the volume fractions of gases in a mixture, we need to use the partial pressures of the gases and apply Dalton's law of partial pressures. Dalton's law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of the partial pressures of the individual gases.

In this case, we are given the partial pressures of the gases in the mixture: 39,990 Pa for the oxide gas and 66,650 Pa for the dioxide gas.

To calculate the volume fractions, we can use the following formula:

Volume fraction of a gas = (Partial pressure of the gas) / (Total pressure of the mixture)

Let's calculate the volume fractions of the gases in the mixture:

1. Calculate the total pressure of the mixture by summing the partial pressures of the gases: Total pressure = Partial pressure of oxide gas + Partial pressure of dioxide gas

2. Calculate the volume fraction of the oxide gas: Volume fraction of oxide gas = (Partial pressure of oxide gas) / (Total pressure of the mixture)

3. Calculate the volume fraction of the dioxide gas: Volume fraction of dioxide gas = (Partial pressure of dioxide gas) / (Total pressure of the mixture)

Let's plug in the given values and calculate the volume fractions:

1. Total pressure of the mixture: Total pressure = 39,990 Pa + 66,650 Pa

2. Volume fraction of the oxide gas: Volume fraction of oxide gas = 39,990 Pa / (39,990 Pa + 66,650 Pa)

3. Volume fraction of the dioxide gas: Volume fraction of dioxide gas = 66,650 Pa / (39,990 Pa + 66,650 Pa)

Now, let's calculate the volume fractions using the given values:

1. Total pressure of the mixture: Total pressure = 39,990 Pa + 66,650 Pa = 106,640 Pa

2. Volume fraction of the oxide gas: Volume fraction of oxide gas = 39,990 Pa / 106,640 Pa

3. Volume fraction of the dioxide gas: Volume fraction of dioxide gas = 66,650 Pa / 106,640 Pa

Therefore, the volume fractions of the gases in the mixture are approximately:

- Volume fraction of the oxide gas: 0.375 - Volume fraction of the dioxide gas: 0.625

Please note that these calculations are based on the given partial pressures and Dalton's law of partial pressures.