
Chem Unit 10 Review
Authored by Jonathan Meier
Science
9th - 12th Grade
NGSS covered
Used 55+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When a catalyst is added to a reaction, a decrease occurs in the
activation energy
heat of reaction
potential energy of the reactants
potential energy of the products
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement describes characteristics of an endothermic reaction?
The sign of △H is positive and the products have less potential energy then the reactants
The sign of △H is negative, and the products have less potential energy than the reactants
The sign of △H is positive and the products have more potential energy then the reactants
The sign of △H is positive, and the products have more potential energy than the reactants
Tags
NGSS.HS-PS1-4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a chemical reaction, a catalyst changes the
heat of reaction
potential energy of the products
activation energy
potential energy of the reactants
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given the change of phase: CO₂(g) changes to CO₂(s), the entropy of the system
remains the same
You cannot determine the answer with the given information.
increases
decreases
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which tendencies favor a spontaneous reaction?
decreasing enthalpy and decreasing entropy
increasing enthalpy and increasing entropy
increasing enthalpy, and decreasing entropy
decreasing enthalpy and increasing entropy
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which phrase best describe the following reaction 2H₂ + O₂ --> H₂O + energy?
endothermic, absorbing energy
endothermic, releasing energy
exothermic, releasing energy
exothermic, absorbing energy
Tags
NGSS.HS-PS1-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The change in free energy of a chemical equation is represented by a
△H
△G
△T
△S
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