CHM1025C Module One: Sample Exam Homework Answers

                  

Part D1: Chemical/Physical/Nuclear Properties (Section 3.6)  5 points

1. Define: Physical Property: A physical property refers to those characteristics of a pure substance that we can change without changing the composition of the substance.

 

2. Chemical Property: A chemical property of a pure substance decribes the chemical reactions with other substances.

 

3. Classify each of the following as a chemical or physical property:

   

a.      Color  __ Physical Property __

 

b.      Odor  ___Physical Property ___

 

c.       Reaction with water:  ___Chemical Property___

 

d.      Solubility in water:      __ Physical Property ___

 

e.      Melting point:             ___ Physical Property ____

 

f.        Boiling point:              ___ Physical Property ____

 

g.      Sublimation Point:      __ Physical Property ____

 

h.      Reaction with oxygen  __ Chemical Property ____

 

i.        Density:       ____ Physical Property __

 

j.        Solid state:  ____ Physical Property __

 

k.       Reaction producing a Gas:  __ Chemical Property ____

 

l.        Conductor of electricity:       ___ Physical Property ____

 

m.     Water is insoluble in gasoline: _ Physical Property ___

 

n.      Good conductor of heat:  ___ Physical Property ___

 

o.      Two chemicals when mixed gives of heat: __ Chemical Property ___

 

p.      Appearance at Room Temperature:  ___ Physical Property __

 

q.      An element turns black when heated __ Chemical Property __

 

r.        Silver tarnishes in Air __ Chemical Property __

 

s.       An element is radioactive: __Nuclear Property__