1.1. Methanol is an alcohol that will undergo a combustion reaction.

The chemical equation for is:

2CH₃OH + 3O₂ → 2CO₂ + 4H₂O

Table 1 shows the bond energies of different bonds.

Table 1

Use the bond energies in Table 1 to calculate the overall energy change for the combustion of methanol.

1.2. Explain why, in terms of bonds breaking and forming, the combustion of methanol is an exothermic reaction.

1.3. Complete the energy profile for the combustion of methanol shown in Figure 1.

You need to label:

• The products

• The overall energy change

• The activation energy

Figure 1