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
Messages
160
Reaction score
0
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?

ques1.jpg


ques2.jpg
 
Physics news on Phys.org
Any help please?
 
I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
Thread 'How to find the pH of a galvanic cell (MIT OCW problem set)'
This is the final problem in this problem set from MIT OCW. Here is what I did to try to solve it The table cited in the problem is below We can easily spot the two redox couples that are in the electrochemical cell we are given. The hydrogen-based electrode has standard potential zero, and the silver-based electrode has standard potential 0.22. Thus, the hydrogen electrode, with the lower potential, is the reducing agent (ie, it is where oxidation happens) and is the anode. Electrons...
Back
Top