Question

Дана смесь метана и этиламина.Определите состав смеси в объёмных процентах, если при пропускании смеси объёмом 20 дм³ через разбавленную серную кислоту,объём смеси уменьшился до 10 дм³

Answer 1

V(CH4;CH2NH2)=20 дм3
  x1       x1-10
------ =  ----------  22,4x1=22,4x1-224
22,4       22,4
 
 x2         x2-10
--------=-----------  22,4x2=22,4x2-224
 22,4      22,4
Объем метана
V(CH4)=224/22,4=10дм3
V(CH2NH2)=20-10=10дм3
Объемная доля соединений
доля(CH4)=10/20*100=50%
доля(CH2NH2)=100-50=50%

Answer 2

Determining the Composition of a Mixture of Methane and Ethylamine

To determine the composition of a mixture of methane and ethylamine in volumetric percentages, we can use the information provided about the change in volume when the mixture is passed through diluted sulfuric acid.

According to the given information, when the mixture with a volume of 20 dm³ is passed through diluted sulfuric acid, the volume of the mixture decreases to 10 dm³.

To find the composition of the mixture, we need to calculate the volume of each component in the mixture before and after the reaction with sulfuric acid.

Let's assume the volume of methane in the mixture is V₁ dm³ and the volume of ethylamine is V₂ dm³.

Before the reaction: - Volume of methane (V₁) + Volume of ethylamine (V₂) = 20 dm³

After the reaction: - Volume of methane (V₁) + Volume of ethylamine (V₂) = 10 dm³

From the given information, we can deduce that the volume of the mixture decreases by half after the reaction.

Now, let's calculate the composition of the mixture in volumetric percentages.

The volumetric percentage of methane can be calculated using the formula: Volumetric percentage of methane = (Volume of methane / Total volume of mixture) * 100

Similarly, the volumetric percentage of ethylamine can be calculated using the formula: Volumetric percentage of ethylamine = (Volume of ethylamine / Total volume of mixture) * 100

Substituting the values, we have: Volumetric percentage of methane = (V₁ / 10) * 100 Volumetric percentage of ethylamine = (V₂ / 10) * 100

Since we don't have the exact values of V₁ and V₂, we cannot determine the precise composition of the mixture in volumetric percentages without additional information.

Please provide any additional information or values you may have, and I will be happy to assist you further.