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Craville Studies Chemistry Test #2

 

Note: You will most likely need a calculator, a periodic table and the chemistry formula sheet to complete this quiz.

Name:
1. Write down the empirical formula for ethylene. (Do so in the form: H2O or C6H12)

2. How many hydrogen atoms are there in ethanol?

Hydrogen Atoms

3. Given the below information, find the molar heat of combustion for ethanol.

    Initial Water Temp: 23oC

    Final Water Temp: 40oC

    Initial Mass of Spirit Burner: 207.60 g

    Final Mass of Spirit Burner: 206.61 g

    Mass of water used: 200g

kJ mol-1 (Whole Number)


4. How many grams of ethanol would it take to produce 10kJ of energy given:

    Ethanol's Molar Heat of Combustion: 1360 kJ mol-1

    The temperature rose 10oK.

grams (Two decimal places)

5. A student undertook an experiment to determine the molar heat of combustion for 1-Butanol. Given the following information, how much water did the student use?

    Temperature Rise: 15oK

    Energy liberated: 23.9 kJ

mL (Whole Number)

6. What is the molar mass of ethanol?

grams (Three decimal places)

7. The following equation is NOT balanced. Balance it. How many moles of ethanol would be produced if three moles of glucose underwent fermentation?

     C6H12O6  -->  CH3CH2OH  +  CO2

Moles (Whole Number)

8. If I have 300 grams of ethanol, how many moles of ethanol do I have?

Moles (One decimal place)

9. What would the cell potential be in a galvanic cell consisting of zinc as the anode and copper as the cathode?

V (Two decimal places)

10. LDPE is produced at a temperature of...?

oC (Nearest 100 degrees)


 

  Last Updated 06/08/2007