Draw the lewis structure for NH3. Then identify the electron pair geometry (EPG), molecular geometry (MG) bond angle (BA), and polarity (P). Select one: a. EPG: tetrahedral, MG: trigonal pyramidal, BA: <109.5*, P: polar b. EPG: trigonal pyramidal, MG: tetrahedral, BA: <109.5*, P: polar c. EPG: tetrahedral, MG: trigonal planar, BA: <120*, P: polar d. EPG: tetrahedral, MG: trigonal pyramidal, BA: <120*, P: non-polar
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Draw the lewis structure for NH3. Then identify the electron pair geometry (EPG), molecular geometry (MG) bond angle (BA), and polarity (P).
NH3 Lewis structure.
Hybridization Sp3 ( Tetrahedral)
Due to one lone pair the bond angle is less than 109°28` due to lone pair bond pair repulsion.
In Electron pair geometry lone pair and bond pair both are considered.
in molecular geometry only bond pair considered.
Dipole moment is non zero so it is polar compound.
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