CHM1025C Module One: Sample Exam Homework Answers

Part E1: Energy Transformations                         5 points

 

Identify two forms of energy that are involved in each of the following energy conversions:

 

1.    relating to a fossil fuel plant:

         a. Burning coal converts water to steam:

              Chemical energy to Heat Energy

 

         b. A turbine spins and drives an electrical generator:
            
Mechanical energy is convert to electrical energy

 

 

2.   Solar Hot Water Energy Panels:

              Light Energy (Radiant) to Heat Energy

 

 

3.   Photovoltaic Solar Energy Panels:

                Light Energy (Radiant) to Electrical Energy

 

 

4.   Radioactive emissions vaporize water into steam

              Nuclear Energy to Heat Energy

 

 

5.   Identify two forms of energy that are involved in each of the following devices:

 

a.  Flashlight:   chemical and light

 

b.  Solar Calculator   Light and Electrical

 

c.  Lead-acid battery  Chemical and Electrical

 

6.   Classify the following energy sources as renewable and nonrenewable:
a. Biomass                  
renewable                f.  Hydropower renewable
b. Petroleum      
nonrenewable         g. Coal nonrenewable
c. Geothermal    
renewable                h. natural gas  nonrenewable
d. Wind               
renewable                 i.  solar  renewable

e.   Uranium                   nonrenewable         j.  propane nonrenewable