4.1 Energy

Question 1

Write the equation for photosynthesis including conditions and exo/endo

Answer 1

6CO2 + 6H2O —-> C6H12O6 + 6O2

Endothermic reaction - requires sunlight/light energy and chlorophyll

Question 2

Name the two types of cellular respiration

Answer 2

Aerobic - involves oxygen

Anaerobic - no oxygen

Question 3

Name types of carbon based fuels

Answer 3

Non-renewable source - depleted faster than it is replenished.
Crude oil
natural gas
coal
oil shale

Question 4

What are the two uses of carbon based fuels?

Answer 4

Used as feedstocks in production of:
synthetic fibres
plastics
paints
solvents 
detergents
dyes
pharmaceutical industry

Used for energy through combustion

Question 5

Explain the key advantages of use of carbon based fuels

Answer 5

Advantages
easily mined at low cost
easily transported
Can be distilled
energy dense
large reserves 
current technology is based on carbon fuels

Question 6

Explain the key disadvantages of use of carbon based fuels

Answer 6

Disadvantages:
Non-renewable 
produces pollutants (soot & CO)
Major contributor to global warming
acid rain
photochemical smog

Question 7

Name types of renewable energy sources

Answer 7

1

Question 8

Discuss the use of carbon based fuels as an energy source rather than a feedstock

Answer 8

1

Question 9

Describe a biofuel

Answer 9

1

Question 10

describe the three ways in which biofuels can be derived

Answer 10

1

Question 11

Explain the difference between bioethanol and biodiesel

Answer 11

1

Question 12

Describe the benefits to the environment when using biodiesel

Answer 12

• reduces c

- increase n

Question 13

Describe the process if transesterification

Answer 13

1

Question 14

Define the term complete combustion

Answer 14

1

Question 15

Define incomplete combustion

Answer 15

1

Question 16

Discuss why incomplete combustion is more common in longer chains

Answer 16

1

Question 17

Describe the effect of the products of incomplete combustion on the environment

Answer 17

1

Question 18

Explain how to balance a combustion equation

Answer 18

1

Question 19

What element are need in a thermochemical equation

Answer 19

1

Question 20

Describe the assumptions made in calorimetry

Answer 20

1

Question 21

Explain one systematic error that could result in an incorrect experimental enthalpy

Answer 21

1

Question 22

Describe the key components of a Galvanic cell

you may use a diagram to aid your description

Answer 22

1

Question 23

How does the metal activity series related to the anode and cathode of a galvanic cell?

Answer 23

1

Question 24

What type of redox occurs when a galvanic cell is recharging

Answer 24

1

Question 25

State the direction in which electron flow due both recharge and discharge

Answer 25

1

Question 26

List the steps to balance a redox half equation in acidic conditions

Answer 26

1

Question 27

What are the key differences in a fuel cell? (list the key components as part of your response)

Answer 27

1

Question 28

What are the disadvantages to the FUEL CELL?

Answer 28

1

Question 29

What are the advantages to the FUEL CELL?

Answer 29

1

Question 30

Describe the key differences and uses of a FLOW CELL/

Answer 30

1

Question 31

What are the disadvantages to the FLOW CELL?

Answer 31

1

Question 32

What are the advantages to the FLOW CELL?

Answer 32

1