1) Which one of the following statements about fuels is correct?
A. Petroleum gas is a form of renewable energy.
B. Electricity can only be generated by burning coal.
C. Carbon dioxide is not produced when biogas is burnt.
D. Biodiesel can be derived from both plant and animal material..
Solution
2) Four fuels undergo complete combustion in excess oxygen, O2, and the energy released is used to heat 1000 g of water. Assuming there is no energy lost to the environment, which one of these fuels will increase the temperature of the water from 25.0 °C to 85.0 °C?
A. 0.889 g of hydrogen, H2
B. 3.95 g of propane, C3H8
C. 0.282 mol of methane, CH4
D. 0.301 mol of methanol, CH3OH
Solution
3) A student is asked to research and then recommend either petrodiesel or biodiesel as the preferred fuel for a small Victorian transport company. The company stores some of its fuel supplies in tanks situated in remote locations for occasional use. The air temperature in these remote locations can range between 0 °C and
40 °C. Based on this information, the student would recommend petrodiesel rather than biodiesel because petrodiesel is
A. more hygroscopic, more viscous and less likely to biodegrade when stored.
B. more hygroscopic, less viscous and more likely to biodegrade when stored.
C. less hygroscopic, more viscous and more likely to biodegrade when stored.
D. less hygroscopic, less viscous and less likely to biodegrade when stored.
Solution.
4) CH3CH2OH can be added to petrol to make E10, a type of fuel containing 10% CH3CH2OH. Explain why E10 is more viscous than regular petrol under the same conditions.
Solution
5) Coal seam gas is used to generate electricity. Which one of the following statements applies to coal seam gas?
A. Coal seam gas is mostly methane and is found naturally in commercial quantities near some coal deposits.
B. Burning coal produces less greenhouse emissions, by mass, than burning coal seam gas.
C. Water released during the extraction of coal seam gas is used to irrigate farms.
D. Coal seam gas is extracted from decomposing plant and animal material.
Solution