Calculate the approximate enthalpy of the following reaction using the data below. 6 "C" atoms joined together in a straight line with as many Hs connected so that each C atom has 4 bonds in total added to as many O2 atoms (which is O double bonded to another O) as would be required to react gives CO2 which is a C double bonded to two O atoms and water which is O single bonded to 2 "H" atoms. This reaction needs to be balanced. Data for bond energies in kJ/mol : C single bond C is 347. C single bond H is 414. C double bond O is 736. O double bond O is 498. O single bond H is 464.
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.
Calculate the approximate enthalpy of the following reaction using the data below.
6 "C" atoms joined together in a straight line with as many Hs connected so that each C atom has 4 bonds in total added to as many O2 atoms (which is O double bonded to another O) as would be required to react gives CO2 which is a C double bonded to two O atoms and water which is O single bonded to 2 "H" atoms.
This reaction needs to be balanced.
Data for bond energies in kJ/mol : C single bond C is 347. C single bond H is 414. C double bond O is 736. O double bond O is 498. O single bond H is 464.
Enthalpy change = Sum of bond Enthalpies of reactants - Sum of bond Enthalpies of products
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