E. Mark each description as an exothermic or endothermic reaction. (2 points) Description Exothermic Endothermic A + heat B–ΔHEnergy diagram:Energy of reactants greater than energy of products
Question
E. Mark each description as an exothermic or endothermic reaction. (2 points) Description Exothermic Endothermic A + heat B–ΔHEnergy diagram:Energy of reactants greater than energy of products
Solution
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A + heat: This is an endothermic reaction. In an endothermic reaction, heat is absorbed from the surroundings into the system. The system gains heat, which is why it is represented as a reactant (A + heat).
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B–ΔH Energy diagram: Energy of reactants greater than energy of products: This is an exothermic reaction. In an exothermic reaction, heat is released to the surroundings. The energy of the reactants is greater than the energy of the products, which means energy (in the form of heat) has been released during the reaction.
Similar Questions
Which statement describes the potential energy diagram of an exothermic reaction?A.The activation energy of the reactants is greater than the activation energy of the products.B.The potential energy of the products is equal to the potential energy of the reactants.C.The potential energy of the products is greater than the potential energy of the reactants.D.The potential energy of the reactants is greater than the potential energy of the products.
Which of the following describes an exothermic reaction?A.Hf, reactants = 0B.Hf, reactants = Hf, productsC.Hf, reactants > Hf, productsD.Hf, reactants < Hf, products
Give the general equation for an exothermic reaction. a reactants → products + energy b products → reactants - energy c products → reactants + energy d reactants → products - energy
How is an endothermic reaction identified in an equation?A.The word endothermic is written after the equation.B.Heat is included as a reactant in the reaction.C.The word endothermic is written above the arrow.D.Heat is included as a product of the reaction.
How is an exothermic reaction indicated in an equation?A.Heat is included as one of the products.B.Heat is included as one of the reactants.C.Heat is written above the arrow in the equation.D.Heat is added to both sides of the equation.
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