Hydrocarbons are commonly used as fuelsj0 8orc7/ a8kr uzxx2o,pb pz(.
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 foxwty/kod8k)2 y8d, jbr crude oil?

1.Write balanced chemical equations for the yhhwc2 .kjd5a0bq, )wreactions 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 specific energy from highest to lowest for methai 48m6n36d ycijw tuv e9h8nk2d9npn:ne, hydrogen gas, ethanol, and buta4 decpjd98m2n6y tn9k86 ih nwui:v n3ne?
Use the enthalpies of combustion in Table 14 of the data booklet.

  For the combustion of mad.+g+dck fj 5tidkj3 +gnesium, which of the following are correct for the produk f+j+gdtd. 5 3jk+cidcts and enthalpy of reaction?
Mg(s)+$O_2$(g)→? ΔH?

  What is the sum of the coefficients in t ytl r3jeuf5r((y- 3tihe balanced equation for the combustion (trj3y3i(y f u5 trle-of silver 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) ar*xkp:y/u :zct the cathode and the direction of electron flow in an elepx:z ruky*c/ :ctrochemical fuel cell?

  For an electrochemical fuel c pjl k0/ (*qop*n9vmx.d kgwk6ell in acidic conditions using methanol as the fuel source, which of the following correctly k/vxg .k 0wpd*qn9( p6 o*kmjldescribes the balanced reactions occurring at the anode and at the cathode?

  How many electrons are transferred in the balanced equation in a hydrogen fuelv5s . ve.d8yjt cell under acidic conditionj vv ye8ts..5ds?

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

  Which type of fuel is most likely to undergo incomplete combustia czz 6zf,:pn-on?

  Energy sources can be designated as either renewable ovy61+n hjw0jp j)6q hqr non-renewable, with efficiency cvj)6+1 q jnyw6ph0q jhalculated 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.