Physical Science Chapter 7 Study Guide

 

Endothermic and Exothermic Reactions

Chemical interactions either release energy to the environment (exothermic) or absorb energy from the environment (endothermic).

Michigan Content Statement Code

Statement

C3.4A

Use the terms endothermic and exothermic correctly to describe chemical reactions in the laboratory.

C3.4B

Explain why chemical reactions will either release or absorb energy.

Chemical Changes

Chemical changes can occur when two substances, elements, or compounds interact and produce one or more different substances whose physical and chemical properties are different from the interacting substances. When substances undergo chemical change, the number of atoms in the reactants is the same as the number of atoms in the products. This can be shown through simple balancing of chemical equations. Mass is conserved when substances undergo chemical change. The total mass of the interacting substances (reactants) is the same as the total mass of the substances produced (products).

Michigan Content Statement Code

Statement

C5.2A

Balance simple chemical equations applying the conservation of matter.

C5.2B

Distinguish between chemical and physical changes in terms of the properties of the reactants and products.

C5.2C

Draw pictures to distinguish the relationships between atoms in physical and chemical changes.

 

1.      C5.2A:  Describe what a chemical equation is

 

 

 

 

2.      C5.2A: Identify the parts of a chemical equation

 

 

 

 

3.      C5.2A:  Describe the law of conservation of mass

 

 

 

 

4.      C5.2A:  Balance chemical equations

 

5.      Describe the mole

 

 

 

 

6.      Identify Avogadro’s number

 

 

 

 

7.      Use a periodic table to identify the mass of 1 mole of an element

 

 

 

 

8.      Classify a chemical reaction as synthesis, decomposition, single replacement, double replacement, or combustion

 

 

 

 

9.      C5.2B: Describe what happens during a chemical reaction

 

 

 

 

10.  C3.4A, C3.4B: Compare and contrast endothermic and exothermic chemical reactions

 

 

 

 

11.  C5.2B:  Distinguish between chemical and physical changes in terms of the properties of the reactants and products

 

 

 

 

12.  C5.2C:  Draw pictures to distinguish the relationships between atoms in physical and chemical changes