CHEM 1001/CHM1020/CHM1025C/CHM1032C  Name:__Answer_

 

Module One: Sample Pretest

Part D: Chemical/Physical Change   5 points

State whether each of the following is a physical or a chemical change:

 

___chemical________1. Electricity decomposes water.

 

 

___physical________ 2. Methanol dissolves in gasoline

 

 

___physical________ 3. Dry ice pellets disappear

 

 

___chemical________ 4. Iron oxidizes to rust

 

 

___physical_________ 5. Bromine is a reddish-brown liquid at room temperature

 

 

Part E: Forms of Energy          5 points

 

List the six different forms of energy as an energy wheel:

 

                                        Chemical

 

                            Heat                         Light

 

 

                            Nuclear                   Electrical

 

                                        Mechanical

 

Identify two forms of energy that are involved in each of the following energy conversions relating to a fossil fuel plant:

 

a. Burning coal converts water to steam:

 

                    chemical  to heat

 

 

b. A generator spins to make electricity:

 

                   mechanical to electrical