[填空题]
Energy sources can be designated as eithertnnmj1/xc(wn 2 t) f6(lgt* aq renewable or non-renewab3yac*a1nin7nm c 1x r2le, with effiia1yxa 7rm2*31ncn cn ciency calculated based on the amount of energy that can be produced when combusting a certain amount of fuel.
1.State the balanced chemical equation, with state symbols, for the complete combustion of ethanol $C_2H_5OH$ as a component of biofuel.
2.Calculate the amount of heat energy in kJ released for the combustion of ethanol if 10.0dm$^3$ of $CO_2$ is produced at STP using Sections 2 and 14 of the data booklet. It= kJ
3.Natural gas is a common fuel with a 70−90% methane composition. Assuming that a sample of natural gas is 70% methane, and using Sections 2 and 14 of the data booklet, calculate the volume of natural gas at STP that would be required to produce the same amount of heat energy as calculated for ethanol in (b).
If no answer was determined for (b), use 405 kJ for this question.
volume = dm$^3$ natural gas
4.Using Sections 7 and 14 of the data booklet and a calculation to support your answer, state which fuel, has a higher specific energy.
5.State whether natural gas is renewable or non-renewable and describe one advantage and one disadvantage to its use.
