This last question is different. Just because it is different doesn't make it hard. It's actually very easy. However, you DO have to know simple properties of molecules. Using simple tests, describe one single thing you can do to each pair of compounds in order to tell which is which. ALL YOU ARE ALLOWED TO USE IS: Matches, Water, Dilute NaHCO3, Dilute HCI, and Dilute NaOH. To help you, here is an example of the question, as well as the approach/thought process: "DESCRIBE ONE SINGLE TEST YOU COULD USE TO DIFFERENTIATE BETWEEN NaCl AND C12H22011. ANS: the one test you can perform involves matches. NaCl is inorganic and will not burn, whereas C2H201 WILL burn because it is organic." Simple, yes? Now apply similar thinking to these pairs. OH NH2 а. & OH OH b. & OH CODH С. &
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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