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Enthalpy Revision.doc - Enthalpy Revision True False:...

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Enthalpy RevisionTrue False:Indicate if the statements are True or False andthen correctthe Falsestatements to read TrueStatementTrue/False?All covalent bonds are the same strength.The Law of Conservation of energy says the energy in the universe is constant.Energy is released when a covalent bond is formed.Energy is released to break covalent bonds.Enthalpy change is the fancy word for energy transfer under constant pressure.Enthalpy change has the symbolΔEThere is heat lost from an exothermic reactionIf a reaction gains heat it is an exothermic reactionThe enthalpy change is always a positive value for an exothermic reaction.The enthalpy change is always a positive value for an endothermic reaction.Enthalpy profile diagramsDraw fully labelled simple enthalpy profile diagrams for the following two reactions.CO(g)+ NO2(g) —> CO2(g)+ NO(g)H= - 226 kJmol-1Ea= +134 kJmol-1H2(g) +I2(g)—> 2HI (g)H= +53 kJmol-1Ea= +183 kJmol-11
Writing Equations1.

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Term
Spring
Professor
N/A
Tags
Thermodynamics, Enthalpy, Energy, Exothermic reaction, powder

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