Question

change in volume when 100ml PH3 decomposed to solid phosphorus and H2 gas.
(1) increase in 50ml
(2) decrease in 50 ml
(3) increase in 150 ml
(4) Decrease in 200ml​

Answer 1

Answer:

Hey Mate,

Here Is Your Answer

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The equation for the decomposition is:

4PH3 (g) = P4 (s)+ 6H2 (g) (Elemental phosphorus exists as tetraatomic molecules).

When the temperature and pressure remain the same, 4 ml of PH3 will give 6 ml of H2. (On applying Gay-Lussac's law ).

Hence, 100 ml of PH3 will yield 150 ml of H2.

Increase in volume = (150-100) ml = 50 ml. (The volume of solid phosphorus is negligible).

There is a 50% increase in volume.

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Hope,It Will Help You.