Chemical Thermodynamics Question 127

Question: For the reaction $ PCl_5(g)\to PCl_3(g)+Cl_2(g) $ [MH CET 2004]

Options:

A) $ \Delta H=\Delta E $

B) $ \Delta H>\Delta E $

C) $ \Delta H<\Delta E $

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

$ PCl_5(g)\to PCl_3(g)+Cl_2(g) $ For this reaction $ \Delta ng=2-1=1 $

$ \Delta ng $ is positive, i.e., there is an increase in the number of gaseous moles then $ \Delta H>\Delta E $



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