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Unit 12 Lessons 1 and 2
By Kristina Thibodeaux
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Last updated 5 months ago
8 questions
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Question 1
1.
Question 2
2.
According to the law of conservation of energy, the total energy of the universe is
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Question 7
7.
Question 8
8.
Every collision between reactants results in the formation of new products?
True
False
The energy of the reactants was 100 kJ/mol and the energy of the products is 150 kJ/mol, what is the heat of the reaction?
+250 kJ/mol
-50 kJ/mol
+50 kJ/mol
-250 kJ/mol
The reaction in the previous question is
endothermic
exothermic
The speed of a reaction is determined by
how to molecules change phase.
how old the bonds are.
how the molecules collide.
if it is endothermic or exothermic.
Which of the following are ways to speed up a reaction:
decrease the surface area
remove a catalyst.
decrease the concentration
increase the concentration
use a catalyst.
increase the temperature
increase the surface area
decrease the temperature
Speeding up a reaction means
the frequency of collisions increases.
the frequency of collisions decreases.