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Chemistry
10th
grade
PS.M.1.3 Phase changes and Classifying them as Endothermic or Exothermic Reactions
39 questions
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- 1. Multiple ChoiceWhat type of reaction occurs in a hand warmerexothermicendothermic
- 2. Multiple ChoiceIs photosynthesis an exothermic or endothermic reaction?EndothermicExothermicNeither
- 3. Multiple ChoiceBaking bread and cooking an egg are examples of....?Endothermic processesExothermic processessNone of these
- 4. Multiple ChoiceHave you ever eaten sherbet sweets candy? They fizz in your mouth and your tongue feels cold. Why do you think that is?It is an exothermic reactionIt is an endothermic reactionIt is made of iceIt is dissolving your mouth
- 5. Multiple ChoiceExothermic reactions...Absorb energyRelease energyRelease ColorAbsorb Color
- 6. Multiple Choice
In an endothermic reaction, energy is _________.
absorbed
released
- 7. Multiple Choice
Endo means in or _______.
absorbed
released
- 8. Multiple Choice
Exo means out or ________.
absorbed
released
- 9. Multiple Choice
What instrument would you use to detect an endothermic or exothermic reaction?
triple beam balance
ruler
thermometer
- 10. Multiple Choice
When a candle is lit hydrocarbons are combusting. An exothermic reaction is occuring. Energy is being _________________ .
absorbed
frozen
destroyed
released
- 11. Multiple ChoiceWhich of the following is a sign that a chemical reaction has occurred?change in shapemeltingbubbles of gas appeardissolving
- 12. Multiple ChoiceAfter you mix two substances together, a new substance forms. This is an example of:
Physical ChangeChemical Change - 13. Multiple ChoiceHCl reacts with Zn giving off heatendothermicexothermic
- 14. Multiple ChoiceSurrounding temperature gets coldEndothermicExothermic
- 15. Multiple Choice
Photosynthesis
endothermic
exothermic
- 16. Multiple Choice
Which of the following is a sign that a chemical reaction has occurred?
change in shape
melting
there was colour change
dissolving
- 17. Multiple Choice
if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants
Exothermic
Endothermic
Exotermic
Endotermic
- 18. Multiple Choice
if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants
Endothermic
Exotermic
Exothermic
Entrothermic
- 19. Multiple Choice
The graph above is from which type of reaction?
Endothermic reaction
Exothermic reaction
- 20. Multiple Choice
The graph above is from which type of reaction?
Endothermic reaction
Exothermic Reaction
- 21. Multiple Choice
The products are at a higher energy than the reactants
Exothermic
Endothermic
- 22. Multiple ChoiceWhat is a Chemical Reaction?When two liquids hit each otherWhen a liquid has foamWhen two substances mix and produce new productsWhen a reaction forms with soda and candy
- 23. Multiple ChoiceBaking bread and cooking an egg are examples of....?Endothermic processesExothermic processessNone of these
- 24. Multiple ChoiceNumber placed in front of a chemical formulaproductcoefficientreactantsubscript
- 25. Multiple ChoiceNumber written below & to the right of a chemical symbolsubscriptreactantproductcoefficient
- 26. Multiple ChoiceSubstances present at the start of a chemical reactionsubscriptscoefficientsreactantsproducts
- 27. Multiple ChoiceWhat does the principle of conservation of mass mean?The total mass of the reactants is more than the productsMatter is not created or destroyedThe total mass of the reactants is less than the products
- 28. Multiple Choice
Why does this picture demonstrate the Law of Conservation of Mass?
the number of atoms of each element are the same on both sides
they start out separate and end up combined
the same elements are used
it doesn't demonstrate the Law of Conservation of Mass
- 29. Multiple ChoiceIf there are 4 H atoms on the reactant side, how many H atoms will be on the product side?246You need more information to answer this question
- 30. Multiple ChoiceIs this equation balanced or unbalanced?
H2 + O2 --> H2Obalancedunbalanced - 31. Multiple Choice
Is this an endothermic or an exothermic reaction?
Endothermic
Exothermic
- 32. Multiple Choice
Give the general equation for an exothermic reaction.
Products -> Reactants + Energy
Reactants -> Products - Energy
Reactants -> Products + Energy
Products -> Reactants - Energy
- 33. Multiple Choice
The products of an exothermic reaction likely to be warmer than the reactants as they are releasing heat.
True
False
- 34. Multiple Choice
All combustion reactions are exothermic reactions.
True
False
- 35. Multiple Choice
In an exothermic reaction, the reactants have more stored chemical energy than the products.
True
False
- 36. Multiple Choice
Which statement about the chemical reactions of photosynthesis is true?
They are endothermic.
They product energy in the form of light.
They can be represented by an equation.
All of the above
- 37. Multiple Choice
What is the general equation for an endothermic reaction?
Products - Energy -> Reactants
Reactants + Energy -> Products
Products +Energy -> Reactants
Reactants - Energy -> Products
- 38. Multiple Choice
Choose the example(s) of an endothermic reaction.
The chemical reaction that causes an instant ice pack to get cold
Squeezing the cold pack breaks an inner bag of water
Splitting a gas molecule
All of the above
- 39. Multiple Choice
Which chemical reaction needs more energy to break bonds?
Endothermic
Exothermic
- Answer choicesTagsAnswer choicesTags