Standard enthelphy change and hybridisation

AI Thread Summary
The discussion revolves around two questions regarding standard enthalpy change and electron configuration. For the standard enthalpy change, the correct formula is indeed product minus reactant, contrary to the confusion expressed about the provided answer. Regarding the valence electrons in Fe2+, it retains six valence electrons due to its electron configuration, despite losing two electrons. Clarification on these concepts is essential for understanding thermodynamics and electron arrangements. Accurate comprehension of these topics is crucial for further studies in chemistry.
crays
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Hi guys, here i have two question, but i don't understand the answer at all.

For the standard enthalphy change question 5) b) i) shouldn't it be standard enthalphy change = Product - Reactant? But from the answer it was given as reactant - product.

For question number 8, i don't understand why Fe2+ still has 6 valence electrons, shouldn't it be 4?

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Any help please?
 
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