The enthalpy diagram below depicts a chemical reaction involving the generic sub
ID: 556054 • Letter: T
Question
The enthalpy diagram below depicts a chemical reaction involving the generic substances A2,B2, and AB. Which of the statements that follow are true for this reaction? Enter the letters corresponding to ALL of the true statements (A, CE, BDF, etc.).
A2 B2 2 AB A) H for the reaction is negative. B) The reacting system absorbs heat from the surroundings. C) If the reaction were carried out in an insulated container, the system would get colder. D) B2 is a product E) The reaction is endothermic. F) AB is a product.Explanation / Answer
From the diagram
A2 and B2 are reactants
AB is the product
the enthalpy of reactants is higher than enthalpy of products
A) delta H rxn is negative TRUE
delta Hrxn = H products - H reactants
as we notice H products < H reactants , delta H is negative
B) False
deltaH rxn is negative means the reactive gives energy to surroundings.
C) False
as the reaction gives out heat energy the system gets hotter.
D) False
B2 is a reactant
E) Fase
The reaction sin which heat is liberated are EXOTHERMIC reaactions
F) TRUE
AB is the product.
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