The standard enthalpies of formation of so2 and so3 are ‐297 and ‐396 kj/mol respectively. calculate the standard enthalpy of reaction for the reaction: so2(g) + 1/2 o2(g) --> so3 (g)

The enthalpy of the reaction is coming out to be -99 kJ.

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as

The equation used to calculate enthalpy change is of a reaction is:  

For the given chemical reaction:

The equation for the enthalpy change of the above reaction is:

We are given:

Putting values in above equation, we get:

Hence, the enthalpy of the reaction is coming out to be -99 kJ.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).