ce 24: Module 1 Assignment Booklet 18 For questions 5 to 9, read each question carefully. Decide which of the choices BEST completes the statement or answers the question. Place your answer in the blank space given. 2 5. Iron oxide (FeO)) seperated into solid iron an example of a (Fe (0)) and oxygen (O2) is A. simple composition reaction B. simple decomposition reaction C. combustion reaction D. neutralization reaction 6. In a simple composition reaction, A. one substance combines with another to form a salt and water B. two or more elements combine to form a compound C. a compound is broken down into two or more elements D. water is separated into hydroxgen gas and oxygen gas 7. fuel + oxygen → carbon dioxide + water vapour + energy This word equation is an example of a A. simple composition reaction B. simple decomposition reaction C. combustion reaction D. neutralization reaction 8. hydrochloric acid + magnesium hydroxide → magnesium chloride + water This word equation is an example of a A. simple composition reaction B. simple decomposition reaction C. combustion reaction D. neutralization reaction 9. Which type of reaction would most likely be endothermic? A. a simple composition reaction B. a simple decomposition reaction C. a combustion reaction D. a neutralization reaction
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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