Hydrocarbons are commonly used as fuel2aho,i:38ud3 xp:ucbk f3 b pqs.
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 correct for crubbn;etdk3;0 dsl*38ghfdj nu/v):ipde oil?

1.Write balanced chemical eq 48t-1cfmb1fcnuma l/uations for 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 of y/y2jm sf kki 7as i0c7d81,vgspecific energy from highest to lowest for methane, hydrogenm s81k,gd02 /7i kcja7 yyifsv gas, ethanol, and butane?
Use the enthalpies of combustion in Table 14 of the data booklet.

  For the combustion of mbg nud(k r6o0)ql8 hxg9k 2/yeagnesium, which of the following are correct for the products and hk/ldk068y)rqbe2gu9n (go xenthalpy of reaction?
Mg(s)+$O_2$(g)→? ΔH?

  What is the sum of the coefficients in the balanceczh *m22c77m njhh* (*aswpyhd equation for the combustion of silver metal to form solid silver s7n2jhhw h**7(a h* z2ympc cmoxide?

  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 threot y) z.4:qye product(s) at the cathode and the direction of electron flow in az.4: yto yreq)n electrochemical fuel cell?

  For an electrochemical fuel 2ns9 +e7 0cy*a.qx0hg/ubiv cn en7docell in acidic conditions using methanol as the fuel source, which of the following correctly describes the balanced reactions occurring at the anode and at the cny2an+odu0sv cbn iehq/ec79* .g0x 7athode?

  How many electrons are nx id ,wu ij-z);3iwa0transferred in the balanced equation in a hydrogen fuel cell u x,i-z 3w;i0iuajd)w nnder acidic conditions?

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

  Which type of fuel is moso f r*2d./1gxs6s2nl,. gni mougcbc*79p odkt likely to undergo incomplete combustion?

  Energy sources can be *nk(yqlkw kt56+3 nlu c/bjmu*f7m1jdesignated as either renewable or non-renewable, with efficiency calculated based on the amount of energy that can be prnfl u*w / k5t3kj6+m yq*um(bjl 1c7nkoduced 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.