1-12 Chemical Reactions Endo/Exo review

Look at the model of methane CH4 below.  We call this structure a(n) _

• element
• solution
• compound
• atom

Tags

NGSS.MS-PS1-1

Which element in the formula has the largest number of atoms?

• a. carbon
• b. hydrogen
• c. nitrogen
• d. oxygen

Tags

NGSS.MS-PS1-1

When Calcium Chloride and Baking soda combine, the starting temperature of the reactants is 22°C. At the end of the reaction the temperature increases to 25°C. Identify this as an endothermic or exothermic reaction.

• Endothermic
• Exothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How many elements in the following compound:  C₂H₆O

• 2
• 3
• 4
• 9

Tags

NGSS.MS-PS1-1

Analyze the diagram, then answer the questions What substance is the inner glass tube filled with?

• Hydrogen
• Carbon
• Hydrogen peroxide solution
• Phenylethynyl

Tags

NGSS.MS-PS1-2

How many atoms of Hydrogen are in the following Glucose compound

• 3
• 12
• 24
• 6

Tags

NGSS.MS-PS1-1

How many atoms of Calcium (Ca) are in the following  compound

• 6
• 2
• 3
• 8

Tags

NGSS.MS-PS1-1

Identify the following as an endothermic or exothermic reaction.

• Endothermic
• Exothermic

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Analyze the diagram then answer the questions Atoms of which element make up most of the molecule in the diagram? (hint look at the chemical formula)

• Hydrogen
• Carbon
• Anthracene
• Phenylethynyl

Tags

NGSS.MS-PS1-1

Instant heat packs are used by athletes to warm and ease the pain from torn or injured muscles. They relieve pain and speed up healing. The heat pack contains calcium chloride and an inner bag of baking soda solution. When the inner bag is broken, the calcium chloride dissolves in the solution and releases energy in the form of heat. What type of reaction is the chemical process described above in a heat pack?

• Endothermic
• Exothermic
• Neither

Tags

NGSS.MS-PS1-2