Предмет: Химия, автор: wwwwaaaanok7

Обчисліть об'єм водню необхідний для добування 450 грамів амоніяку якщо відносний віхід продукту реакцій становить 20 %

Ответы

Автор ответа: zcik46609
0

Відповідь:

Реакція добування амоніаку має наступний вигляд:

N2 + 3H2 → 2NH3

Захід розв'язання:

Знайдемо масу амоніаку, що може утворитись за рівнянням реакції.

Молярна маса NH3 = 14 г/моль + 3 × 1 г/моль = 17 г/моль

Кількість молей NH3, яку можна отримати з 85 г:

n(NH3) = m(NH3) / M(NH3) = 85 г / 17 г/моль = 5 моль

Обчислимо кількість молей водню, що потрібна для добування такої кількості амоніаку з урахуванням відносного вихіду продукту реакції.

n(H2) = n(NH3) × (3 моль H2 / 2 моль NH3) / 0,45 = 10 моль

Обчислимо об'єм водню за стандартних умов (н.у.):

V(H2) = n(H2) × 22,4 л/моль = 10 моль × 22,4 л/моль = 224 л

Тому, для добування 85 г амоніаку з відносним вихідом продукту реакції 45% потрібно 224 л водню (н.у.).

Пояснення:

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