For which of the following reactions is AHîxn equal to AH; of the product(s)?You do not need to look up any values to answer this question. Check all that annly.
Basics in Organic Reactions Mechanisms
In organic chemistry, the mechanism of an organic reaction is defined as a complete step-by-step explanation of how a reaction of organic compounds happens. A completely detailed mechanism would relate the first structure of the reactants with the last structure of the products and would represent changes in structure and energy all through the reaction step.
Heterolytic Bond Breaking
Heterolytic bond breaking is also known as heterolysis or heterolytic fission or ionic fission. It is defined as breaking of a covalent bond between two different atoms in which one atom gains both of the shared pair of electrons. The atom that gains both electrons is more electronegative than the other atom in covalent bond. The energy needed for heterolytic fission is called as heterolytic bond dissociation energy.
Polar Aprotic Solvent
Solvents that are chemically polar in nature and are not capable of hydrogen bonding (implying that a hydrogen atom directly linked with an electronegative atom is not found) are referred to as polar aprotic solvents. Some commonly used polar aprotic solvents are acetone, DMF, acetonitrile, DMSO, etc.
Oxygen Nucleophiles
Oxygen being an electron rich species with a lone pair electron, can act as a good nucleophile. Typically, oxygen nucleophiles can be found in these compounds- water, hydroxides and alcohols.
Carbon Nucleophiles
We are aware that carbon belongs to group IV and hence does not possess any lone pair of electrons. Implying that neutral carbon is not a nucleophile then how is carbon going to be nucleophilic? The answer to this is that when a carbon atom is attached to a metal (can be seen in the case of organometallic compounds), the metal atom develops a partial positive charge and carbon develops a partial negative charge, hence making carbon nucleophilic.
Please answer question 14 part A and B
![The standard heat of formation, AH , is defined as the
enthalpy change for the formation of one mole of
substance from its constituent elements in their
Part A
standard states. Thus, elements in their standard states
have AH: = 0. Heat of formation values can be used
For which of the following reactions is AHn equal to AH; of the product(s)?You do not need to look up any
values to answer this question.
rxn
to calculate the enthalpy change of any reaction.
Check all that apply.
Consider, for example, the reaction
• View Available Hint(s)
2NO(g) + O2(g) = 2NO2 (g)
with heat of formation values given by the following
O CO(g) +O2(g)→CO2(g)
table:
ΔΗ
|(kJ/mol)
O C(s, graphite) +O2(g)→CO2(g)
Substance
NO(g)
Na(s) + Cl2 (g)→→NaCl(s)
90.2
O2 (g)
O Na(s) + Cl2 (1)→NaCl(s)
NO2(g)
33.2
CACO3 (g)→CAO + CO2(g)
Then the standard heat of reaction for the overall
reaction is
O 2Na(s) + Cl2 (g)→2NaCl(s)
AHm= AH;(products)- AH; (reactants)
[2(90.2) + 0]
rxn
2(33.2)
-114 kJ](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fded90a0e-1aa2-42d3-8902-387fb21746ad%2F9e3abdc5-394e-4318-b2a3-e1ec66ae79bf%2Flhy7fpn_processed.png&w=3840&q=75)
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