Hydrocarbons are common orha8q9 q*2jply used 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 followin u 3biir:t*s5eg is correct for crude oil?

1.Write balanced chemical equations for the reactio.y8u 1g-n sqkcns 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 orde*l m c+iw8)tr,k0 vxmrr of specific energy from highest to lowest for methane, hydrogen gkr wcv+ri8,)*0mxmtl as, ethanol, and butane?
Use the enthalpies of combustion in Table 14 of the data booklet.

  For the combustion of magnesium, whic 4/kdjt q tk2nv/*oz5y/ipa-gh of the following are correct for the products and en2 d kz5*4aiotgpjn /t/v-q/yk thalpy of reaction?
Mg(s)+$O_2$(g)→? ΔH?

  What is the sum of the coefficients in the balanced equation for the combustion0 hf2 x4 gy:pdjxdx)v* of )0p *dyvx 4gx:2 djxfhsilver metal to form solid 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 correctly depicts the product(s) at the cat2cns3yncqs+u-i3 p m*hode and the direct3cpny3*2+i qunsscm -ion of electron flow in an electrochemical fuel cell?

  For an electrochemical fuel cell in acidic conditions using methanol as the jnr8n+jol3e :yd):nk fuel source, which of the following correctly describes the balanced reactions occurring at the anode and at the en kdjn n3:8r:jol+y) cathode?

  How many electrons are transferred in the balanced equation in a hydroge 2djjh07y7bakjv n*7ote1(hjn fuel cell under acidic condi *177bejhvj n7h(a02j tdykjotions?

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

  Which type of fuel is most likely to undergo jt7zxhp j-g 3,z*ft9ty za 8e,incomplete combustion?

  Energy sources can be desz9m sj/s fkq 0/b viy9m);h8olignated as either renewable or non-renewable, with efficiency calcqjb8v hs0 fl/ozm ;9i/9y skm)ulated 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,  ----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.