MnO2 + 4HCI -→ MnCl2 + 2H2O + Ch For items 7 to 9: 7. What is the mole ratio of MnO2 to H2O? 8. What is the mole ratio of 4HCI to MnC2? 9. What is the mole ratio of MnO2 to C2? For items 10 to 12: 4HCI + HNO3 → Ch+ NOCI + 2H2O 10. What is the mole ratio of HCI to H2O? 11. What is the mole ratio of HNO3 to NOCI? 12. What is the mole ratio of HCI to Cl2?
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.
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