Which is correct and which is incorrect from the following sentences? Proposition True False (a) The nitrogen ions N + and oxygen O + are products of the decay of the corresponding molecules under the influence of sunlight near the earth's surface. (b) Red phosphorus is more active than white phosphorus and is therefore used in the manufacture of matches. (c) The oxidation number (a.o.) of nitrogen in all chemicals NO, NO + and NO- is +2
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.
Which is correct and which is incorrect from the following sentences? Proposition True False (a) The nitrogen ions N + and oxygen O + are products of the decay of the corresponding molecules under the influence of sunlight near the earth's surface. (b) Red phosphorus is more active than white phosphorus and is therefore used in the manufacture of matches. (c) The oxidation number (a.o.) of nitrogen in all chemicals NO, NO + and NO- is +2. (d) Of the elements Al, Cl2, Na, Mg and Ca, only Na reacts with cold water to produce H2. (e) Of the two common carbon oxides, monoxide is less acidic.
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