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Question

For 2SO2(g)+O2(g)2SO3(g), ΔH is equal to:

A
ΔU+2RT
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B
ΔU2RT
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C
ΔURT
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D
ΔU+RT
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Solution

The correct option is C ΔURT
We know, ΔH=ΔU+ΔngRT
where ΔH = change in enthalpy of the reaction
ΔU = Change in internal energy
Δng = difference in gaseous moles of products and reactants = 23=1
so, ΔH = ΔURT

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