Hydrocarbons are commonly used-ocg00e2 lz xl as fuels.
1.1.Define average bond enthalpy.
1.2.Write a balanced chemical equation for the complete combustion of propene ($CH_4CHCH_2$).
2.Using section 11 (Section 12- 2025 Syllabus) of the data booklet, calculate the enthalpy of combustion for propene.
ΔH=-  kJ mol$^{-1}$
Important note: The section numbers mentioned in the video solution are specific to the 2024 syllabus.
You can refer to the question stem to find the section numbers for the 2025 syllabus.

  Which of the following is corret3 g93 t,zds9c mw* k:fd;sqlrct for crude oil?

1.Write balanced chemical equations for 1 wcq;s5 vnpltfvlew ;v8(.s3pw*x* qd7j x8m the reactions below:

1.1.Combustion of decane in excess of oxygen.
1.2.Combustion of butane in a limited supply of oxygen.
1.3.Complete combustion of ethanol.

2.Specify the test and its result to identify the presence of a double bond in ethene ($C_2H_4$). Support your answer with a balanced chemical equation.

3.Write an equation to show the polymerization of ethene and write the name of the polymer.

  What is the correct order oh093dawhm d6*r z t4fx w35zpcf specific energy from highest to lowest for methane, hydrogen gas, ethanol, and butane?f6z3 hc9pxd wrdm5t 0z3aw4h*
Use the enthalpies of combustion in Table 14 of the data booklet.

  For the combustion of magnesium, which of the following are correskzv l7alj)9)ct for the products and enthalpy of rea)l9vs7jlka) z ction?
Mg(s)+$O_2$(g)→? ΔH?

  What is the sum of the coefficients in the balanced equation for the combust 8 r7knsvsly0.ion of silver metal to form sol0sry 8nl.v k7sid silver oxide?

  Which of the following correctly states the products for the combustion of butane under conditions where there is very little oxygen?

  Ethanol in biofuel is produced through which of the following methods?

  Which of the following correctlysciu8 i6wck ujbqx8v((v 2(bd:/u9 ak depicts the product(s) at the cathode and the direction of electron flow in acui 89vauxjib: b2(/ k68k( s(cqvuwdn electrochemical fuel cell?

  For an electrochemical fuel cell in acidic conditions using meth0g0gt j .i yvfrt2fg+2anol as the fuel source, which of the following correctly describes the balanced reactions occurring at the anode.j00+2vfy2g fttgir g and at the cathode?

  How many electrons are transferred in the balanced equation in a hydrj 9n y/ 6imrdda9tdb8k6jt:4 qogen fuel cell under acidic conditionsrdm9:8i 9jdd b6qjtyt4ka6 n/?

Overall reaction:2$H_2$(g)+$O_2$(g)→2$H_2O$(l)

  Which type of fuel is most likely3t v/l+ ruk n6llfjrq.hr,q12 to undergo incomplete combustion?

  Energy sources can be designated as either renewable or non-renewable, withidub7/fj-ze i6:wd/wsq f (q; efficiency calculated based on the amount of energy that can be produced when combuf ;z- w/uwd/7(iji:e6qsbfdqsting 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,  ----待选择----ethanol methane  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.