Oxidation of the cyanide ion produces the stable cyanate ion, OCN-. The fulminate ion, CNO- , on the other hand, is very unstable. In fact, fulminate salts explode when struck; mercury(II) fulminate, Hg(CNO)2 , is used in blasting caps. Draw the Lewis structures and assign formal charges for the cyanate ion and the fulminate ion. ( C is the central atom in OCN- and N is the central atom in CNO-). Assign non-zero formal charges next to each atom. Include all valence lone pairs in your answer. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate resonance structures using the ↔ symbol from the drop-down menu. Do not use the square brackets tool in your answer.
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.
Oxidation of the cyanide ion produces the stable cyanate ion, OCN-. The fulminate ion, CNO- , on the other hand, is very unstable. In fact, fulminate salts explode when struck; mercury(II) fulminate, Hg(CNO)2 , is used in blasting caps.
Draw the Lewis structures and assign formal charges for the cyanate ion and the fulminate ion. ( C is the central atom in OCN- and N is the central atom in CNO-). Assign non-zero formal charges next to each atom.
- Include all valence lone pairs in your answer.
- Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner.
- Separate resonance structures using the ↔ symbol from the drop-down menu.
- Do not use the square brackets tool in your answer.
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