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Q.

Which of the following relationship is correct for a reaction involving both reactants and products are in either solid or liquid state ?

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a

ΔH = ΔE

b

ΔH > ΔE 

c

ΔH <  ΔE 

d

ΔH –  ΔE = ∞

answer is B.

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Detailed Solution

If the reaction involves products and reactants in solid/liquid in state then

The number of moles of gases particles is zero

From the formula of enthalpy, ΔH = ΔE + ΔngRT 

ΔH = ΔE + 0RT ; ΔH = ΔE 

 

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