Question

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A reaction will only be spontaneous if the change in enthalpy is more negative than the product of −TΔS is positive.


TRUE


FALSE
2 points
Question 26
Which of the following will favor a spontaneous change?
+ΔH
−ΔH
+ΔS
−ΔS



I only


II and IV


III only


II and III
3 points
Question 27
According to collision theory, the greater number of effective collisions that occur between reactant particles per second, the greater the rate of reaction.


TRUE


FALSE
2 points
Question 28
Pulverizing a solid reactant from chunks into a powder can affect the rate of the chemical reaction.


TRUE


FALSE
2 points
Question 29
Explain how changing the surface area of a solid can affect the rate of reaction.






















































































































Path: p

Words:0
5 points
Question 30
In an energy diagram for an exothermic chemical reaction, the total energy change is the difference in energy between the energy of the reactants and the energy of the products.


TRUE


FALSE

Answer 1

1. False

2. −ΔS

3. True

4. true

5. Increasing the surface area of a solid reactant exposes more of its particles to attack. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.