Question

At high trns phosphine (pH2) dissociates into phosphorus and hydrogen by the following reaction: At SOW C the rate at which phosphine dissociates is for I in seconds. The reaction occurs in a constant volume. 3-L vessel, and the initial concentration of phosphine is 5 kmol/rn3. If 3 rnol of the phosphine reacts. how much phosphorus and hydrogen is produced?

Answer 1

Answer: 0.75 moles of Phosphorus and 4.5 moles of Hydrogen are produced respectively from 3 moles of Phosporus.

Explanation:

4PH3 --------> P4 + 6H2

From the stochiometry of the reaction,

4 moles of Phosphine gives 1 mole of Phosphorus

3 moles of Phosphine will give (3×1)/4 moles of Phosphorus.

Therefore, 0.75 moles of Phosphorus is produced.

Similarly, 4 moles of Phosphine gives 6 moles of Hydrogen

3 moles of Phosphine will give (3×6)/4 moles of Hydrogen.

Therefore, 4.5 moles of Hydrogen is produced.

QED!