Question

Change in volume when 10 ml of phosphine is decomposed :

Answer 1

hey here is your answer ______________________________
The Equation for the decomposition is..
4PH3 = P4 + 6H2
( Elemental Phosphorus exists as tetraatomic molecules)

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

Hence ,
10 ml of PH3 will yield (10/4)×6ml of H2

10 ml of PH3 will yield 15ml of H2

then ...

Increase in volume = 15-10=5ml
(The volume of solid Phosphorus is negligible)

there is a 50% Increase in volume..

I am not sure but I hope it will help you for getting answer

Answer 2

I thought this will be the answer .