Based upon the energy diagram given below,which letter represents the enthalpy for the reaction? 
Definitions:
Equilibrium Price
The price at which the quantity of a good or service demanded by consumers equals the quantity supplied by producers, resulting in a stable market condition.
Pollution
The release of harmful substances or products into the environment as a result of human activity.
Marketplace
A physical or digital location where goods and services are exchanged between buyers and sellers.
Externality
A cost or benefit that affects a party who did not choose to incur that cost or benefit.
Q2: The second shell has a maximum capacity
Q8: A doctor has given your patient a
Q24: Based on what you know of the
Q25: Which is NOT an example of probabilistic
Q37: Metals gain electrons to become ions in
Q43: The radius of a K atom is
Q50: Which ions in the following reaction
Q58: Based on what you know of the
Q66: Barium sulfate is often ingested to
Q71: In a system of equilibrium,it is true