8 Evaluating information in an extended response question. Use the reactivity series provided to explain whether or not the following reactions will take place. Then describe how you could identify an unknown metal using the reactivity series. Reaction 1: iron and copper oxide Reaction 2: zinc and magnesium oxide Reaction 3: magnesium and magnesium oxide. In this question you get marks for how well your answer is written. You will get marks for: . spelling • grammar . organising your ideas and information clearly using key scientific words. . magnesium most reactive aluminium zinc iron lead copper silver gold least reactive
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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