chem

Iron(II) chloride is formed from the reaction between iron and copper(II) chloride. Fe + CuCl2 mc013-1.jpg FeCl2 + Cu If the reactants have mc013-2.jpgHf = -256 kJ mol-1 and the products have mc013-3.jpgHf = -321 kJ mol-1, which reaction pathway graph would have a similar shape to this reaction? mc013-4.jpg mc013-5.jpg mc013-6.jpg mc013-7.jpg

1.mc013-4.jpg

Consider the reaction pathway graph below. mc024-1.jpg Which inference is supported by evidence in the graph? The energy required to make the activated complex is greater than A + C. This is an exothermic reaction where the total release of energy equals A + C. The products need more energy to form than the reactants as shown by F. This is an endothermic reaction because most of the energy is released at A.

:')

Consider the reaction pathway graph below. mc025-1.jpg Which can be used to determine the mc025-2.jpgH? E and D A and B - not this one F only G only

E and D

Consider the diagram below. mc007-1.jpg What does D represent? energy of the products energy of the reactants reactants, Q + R products, N + M - not this one

Energy of the products

Which description explains the role of activation energy in a chemical reaction? It provides useful energy that is released in an exothermic reaction. It stops the products from being formed from the intermediate state. It slows down the overall chemical reaction so it does not happen too quickly. It provides reactants with sufficient energy for bonds to break and reform.

It provides reactants with sufficient energy for bonds to break and reform.

Consider the reaction pathway graph below. mc009-1.jpg Which statement accurately describes this graph? It represents an endothermic reaction because the product has more energy than the reactants. It represents an exothermic reaction because the product has more energy than the reactants. It represents an endothermic reaction because the reactants have more energy than the product. It represents an exothermic reaction because the reactants have more energy than the product.- not this one

It represents an exothermic reaction because the reactants have more energy than the product.- not this one

Consider the reaction pathway graph below. mc008-1.jpg (bottom then up, curve then down Which statement accurately describes this graph? It represents an endothermic reaction because the products have more energy than the reactants. It represents an exothermic reaction because the products have more energy than the reactants. It represents an endothermic reaction because the reactants have more energy than the products. It represents an exothermic reaction because the reactants have more energy than the products.

It represents an exothermic reaction because the reactants have more energy than the products.

Consider the reaction pathway graph below. mc023-1.jpg Which conclusion can be accurately drawn from the graph? mc023-2.jpgHrxn for the complete reaction is negative, but Ea is positive. mc023-3.jpgHrxn for the complete reaction is positive, but Ea is negative. The breakdown of ozone is an exothermic process. The breakdown of ozone is an endothermic process.

The breakdown of ozone is an endothermic process.

Consider the reaction pathway graph below. mc033-1.jpg What inference is supported by the graph? The energy of the activated complex (A) is greater than that of the products (C). The energy of the activated complex (B) is greater than that of the reactants (A). The energy of the products (A) is greater than that of the reactants (C). The energy of the reactants (B) is greater than that of the activated complex (A).

The energy of the activated complex (B) is greater than that of the reactants (A).

Which statement best describes how activation energy influences a reaction? The greater the activation energy, the greater the enthalpy of reaction. The lower the activation energy, the more energy is released. The greater the activation energy, the lower the reaction rate. The lower the activation energy, the lower the energy of the products.

The greater the activation energy, the lower the reaction rate.

Consider the reaction pathway graph below. mc030-1.jpg Which statement describes how this graph would change if the reaction could be made to go faster? The hill would be taller. The hill would be shorter. C would be higher than A + B. C would be equal with A + B.

The hill will be shorter

What happens if the amount of energy that is absorbed by the reactants is less than the activation energy?

The reaction does not occur.

A chemical reaction has mc010-1.jpgHf,reactants = -1,023 kJ and mc010-2.jpgHf,products = -935.3 kJ. Which graph can be used to represent this reaction pathway? mc010-3.jpg - not this one mc010-4.jpg mc010-5.jpg - not this one mc010-6.jpg

b

Consider the reaction pathway graph below. mc009-1.jpg (slant upwords, small curve then vertical) Which statement accurately describes this graph? It represents an endothermic reaction because the product has more energy than the reactants. It represents an exothermic reaction because the product has more energy than the reactants. It represents an endothermic reaction because the reactants have more energy than the product. It represents an exothermic reaction because the reactants have more energy than the product. - not this one

can't find online :') It represents an exothermic reaction because the reactants have more energy than the product. - not this one

Consider the reaction pathway graph below. mc001-1.jpg Which process would produce a similar pathway? condensation dehydration decomposition melting

condensation

Consider the diagram below. mc005-1.jpg What does C represent? enthalpy of reaction activation energy activated complex energy of the reactants

enthalpy of reaction

Which statement best describes the reaction pathway graph for endothermic reactions? mainly downhill always linear always parabolic mainly uphill

mainly uphill

Reactions cannot occur without a certain minimum amount of energy. What is this minimum amount of energy called?

the activation energy