QUESTION 1 Which of the following groups contains only examples of renewable energy sources?

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1 QUESTION 1 Which of the following groups contains only examples of renewable energy sources? B D hydroelectric, coal, wind nuclear, natural gas, solar solar, wind, hydroelectric hydroelectric, natural gas, wind QUESTION 2 Sources of energy can be renewable or non-renewable. Which of the following is true? B D renewable energy source is one that can be replaced as fast as it is consumed, and an example is electricity. renewable energy source is one that is consumed faster than it can be replaced, and an example is geothermal energy. non-renewable energy source is one that is consumed faster than it can be replaced, and an example is natural gas. non-renewable energy source is one that is not used because it damages the environment, and an example is nuclear energy. QUESTION 3 The following is a list of renewable energy sources: Solar energy, wave power, wind power. Select one of the following to add to the list. B D Tidal power oal Oil Nuclear energy The School For Excellence 2018 Unit 3 & 4 hemistry Topic Test Page 1

2 QUESTION 4 Wind power is a renewable source of energy while coal, is non-renewable. (a) Define renewable and non-renewable (b) List one advantage and one disadvantage for each of the above energy sources. QUESTION 5 Name two renewable energy sources. Explain how these energy sources could be integrated into ustralia s current energy use to extend or replace non-renewable energy. In your answer, mention any difficulties that would have to be dealt with. The School For Excellence 2018 Unit 3 & 4 hemistry Topic Test Page 2

3 QUESTION 6 The Snowy Mountains Hydro-electric scheme is one of the most complex hydro-electric power plants in the world. It took 25 years to build and employed over 100,000 people from over 30 countries. Hydro Tasmania also generates a large amount of hydro power in ustralia, utilising the high rainfall and mountainous terrain of Tasmania and other ustralian states, and has recently been expanding further into the Pacific area. In the period , the total amount of electricity produced by hydro-electric schemes in ustralia was 15,400 GWh. This equated to 7.2% of all of the electricity generated in that year. Note: kilowatt hour is a unit of energy equal to 3.6 mega joules, which is the amount of energy converted if work is done at an average rate of one thousand watts for one hour). 1 kwh = 10 3 Wh 1 MWh = 10 6 Wh 1 GWh = 10 9 Wh a. If the average domestic household uses 15.0 kwh of energy per day, determine how many households can be supplied by hydro-electric power for one year. 3 marks The School For Excellence 2018 Unit 3 & 4 hemistry Topic Test Page 3

4 b. The Snowy Mountains Hydro-electric Scheme alone prevents approximately 4.57 x 10 6 tonnes of carbon dioxide from being released into the atmosphere per year. ssuming that petrol is 100% octane and the average car uses 2500 L of petrol in a year, determine the number of cars needed to generate this amount of carbon dioxide. (Density Octane = g/ml) c. The current dollar cost of building the Snowy Mountains Hydro-electric scheme is equivalent to over $6 billion. Why are hydro-electric schemes considered worth investing in considering the huge expense in building them? 3 marks 2 marks Total 8 Marks The School For Excellence 2018 Unit 3 & 4 hemistry Topic Test Page 4

5 QUESTION 1 QUESTION 2 QUESTION 3 QUESTION 4 (a) (b) Renewable means that the energy source is continually being generated or replaced, non-renewable means that the source is found in definite amounts and will eventually run out. Wind: dvantage - cheap or clean, disadvantage- not available everywhere. oal: dvantage - high-energy content, disadvantage- produces O 2 or low efficiency. QUESTION 5 QUESTION 6 a. Energy produced from hydro-electric schemes = GWh = x 10 6 kwh = x 10 6 x 3.6 = x MJ Energy produced by the average home in 1 year = 15 kwh/day = 15 x 365 = 5475 kwh per year = 5475 x 3.6 = MJ Number of houses that could be supplied by hydroelectricity for 1 year = = = 2.81 x 10 6 The School For Excellence 2018 Unit 3 & 4 hemistry Topic Test Page 5

6 b. n(o 2) = = 1.04 x mol n(octane) = = 1.30 x mol m(octane) = 1.30 x x 114 = 1.48 x g v(octane) = = 2.11 x ml = 2.11 x 10 9 L No. of cars = = 8.42 x 10 5 c. Once hydroelectric schemes are built, the running costs are very low. Water is a renewable energy source so hydroelectric schemes prevent non-renewable resources from getting depleted and there is little or no pollution generated. These ongoing benefits outweigh the initial cost of setting up the scheme in the first place. The School For Excellence 2018 Unit 3 & 4 hemistry Topic Test Page 6