Which statement is false for the following graphic? a Reaction #1 is exothermic

Question

Which statement is false for the following graphic? a Reaction #1 is exothermic while reaction #2 is endothermic b. the mathematical sign for the value represented at letter "A" is #1 but positive for reaction #2 c. Letter "B" in each graph represents the energy needed to weaken reactants and start to form the bonds on the product d. Letter "B" represents the activated complex ________ Which of the following would probably cause the greatest increase in the rate between two ionic compounds? a. stirring the compounds together into a non polar solvent b. grinding each compound and combining the resulting powders c. increasing the pressure on the reaction container d. dissolving the compounds in warm water before reacting Which statement is most likely false concerning the graph on the right? a. R1 represents an average rate but R2 represents an instantaneous rate b. the mathematical value for R1 = - delta[A]/(t_2 - t_1) c. the instantaneous rate at t_1 can be used to predict the instantaneous rate at t_2 d. The average rate for the reaction can vary depending on the time interval measured

Explanation / Answer

Q1.

a)

reaction 1 has lower energy in products, so it released energy, i.e. exothermic, and the reverse is correct for reation 2, this is CORECT

b)

False, A is measured from bottom to top, always, so it has the same sign

c)

True, it is the energy required in order to start reaction

d)

True, this is the energy required to start reaction, so the complex is formed here

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