Chemical Reactions Warm Up 3

15 Questions | By John_Mitchell_WV | Last updated: Dec 7, 2017 | Total Attempts: 52

Welcome to the Science Electronic Learning Environment for Physical Science (9th grade) and introduction to basic Chemistry. Our basic concepts incluces "what happens to chemical bonds during a chemical reaction". And what happens to energy during a chemical reaction. Good Luck!

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Questions and Answers

1.

How many moles of carbon dioxide are produced in combustion of propane? (NOTE: Please use a number from 1 to 15 in your answer.)
2.

_____ _____ is the energy stored in the chemical bonds of a substance.
3.

Chemical reactions involve the _____ of chemical bonds in the _____ and the _____ of chemical bonds in the _____.
- A.
  
  Breaking; reactants; formation; products
- B.
  
  Breaking; products; formation; reactants
- C.
  
  Formation; reactants; breaking; products
- D.
  
  Formation; products; breaking; reactants
4.

Does breaking chemical bonds require energy?
- A.
  
  True
- B.
  
  False
5.

During a chemical reaction, energy is either _____ or _____. (NOTE: This is a multiple answer question)
- A.
  
  Released
- B.
  
  Absorbed
- C.
  
  Transferred
- D.
  
  Shared
6.

A(n) _____ _____ is a type of chemical reaction releases energy as a the products forms?
7.

A(n) _____ _____ is a chemical reaction that absorbs energy from its surroundings.
8.

Decomposition reaction of mercury (II) Oxide absorbs _____ kilojoules of energy.
- A.
  
  181.7
- B.
  
  81.7
- C.
  
  287.3
- D.
  
  387.5
- E.
  
  0
9.

When propane reacts with oxygen, the surrounding area becomes _____.
10.

Energy is created during an exothermic reaction
- A.
  
  True
- B.
  
  False
11.

Why does methane gas not react with oxygen at room temperature?
- A.
  
  Lack of energy to cause a reaction
- B.
  
  Too much energy to cause a reaction
- C.
  
  It is not contained a vessel
- D.
  
  Must mix in correct proportions
- E.
  
  You need fluorine to cause the reaction
12.

Methane reacts with oxygen in the following combustion reaction. How many moles of water are produced?
13.

Methane reacts with oxygen in the following combustion reaction. How many moles of carbon dioxide are produced?
14.

When 1 mole of propane reacts with 5 moles of oxygen, _____ kilojoules of energy is released.
- A.
  
  2 220
- B.
  
  1 110
- C.
  
  2 560
- D.
  
  3 125
- E.
  
  2 252
15.

When _____ moles of propane reacts with 5 moles of oxygen, 555 000 kilojoules of energy is released.
- A.
  
  250
- B.
  
  25
- C.
  
  2500
- D.
  
  500
- E.
  
  2 252
- F.
  
  750

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