7. Considering the bond formed for MgO and NaCl, which among the two is easier to use to conduct electricity? Choose among the given choices the answer with correct explanation. |- NaCl because ions of NaCI is easier to separate than MgO Il - MgO because ions of MgO are easier to separate than NaCl III - NaCl because the atoms are bonded by a single electrostatic charge IV - MgO because the atoms are bonded by a single electrostatic charge V - NaCI because the atomic sizes are smaller, thus easier to separate O l only O Il and IV only O l and III only O I, II, and IV
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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