CIE Jun 2015 v3 Paper 4 Q10

Answers available below

10 In recent years there has been worldwide interest in the possible extraction of shale gas (a form of natural gas) as an important energy source. 18 (a) One of the problems associated with using shale gas is its variable composition. Table 1 shows the percentage composition of shale gas from four different sources J, K, L and M. source J K L M CH4 80.3 82.1 88.0 77.5 C2Hx 8.1 14.0 0.8 4.0 C3Hy 2.3 3.5 0.7 0.9 CO2 1.4 0.1 10.4 3.3 In the formulae above, x and y are variables. N2 7.9 0.3 0.1 14.3 (i) Draw the structures of three possible compounds with the formula C3Hy. Table 1 [2] (ii) Which source of shale gas, J, K, L or M, will provide the most energy when burned? Explain your answer.[1] (iii) Suggest two methods by which carbon dioxide can be removed from shale gas. 12[2]UCLES 2015 9701/43/M/J/15<br /> (b) Table 2 shows a comparison of the relative amounts of pollutants produced when shale gas, fuel oil and coal are burned to produce the same amount of energy. 19 air pollutant shale gas fuel oil CO2 CO NO2 SO2 particulates 117 164 0.033 0.548 1.12 0.84 0.040 0.092 0.001 0.007 Table 2 coal 208 0.208 0.457 2.59 2.74 (i) Suggest why shale gas produces the smallest amount of CO2.[1] (ii) Explain which of the three fuels, shale gas, fuel oil or coal, is the largest contributor to acid rain. fuel[1] (iii) Suggest a reason why fuel oil and coal produce more NO2 than shale gas.[1] (iv) State one environmental consequence of raised levels ofCO,CO2.[2] [Total: 10]UCLES 2015 9701/43/M/J/15<br />

Show answer