Ineed
use bond energies to calculate the enthalpy change for the following reaction.
h2(g) + co2(g) > h2o(g) + co(g)

Answer : The enthalpy change for the reaction is, 269 kJ/mol

Explanation :

The given chemical reaction is:

As we know that:

The enthalpy change of reaction = E(bonds broken) - E(bonds formed)

Given:

= enthalpy change

= 436 kJ/mol

= 463 kJ/mol

= 799 kJ/mol

 = 839 kJ/mol

Now put all the given values in the above expression, we get:

Therefore, the enthalpy change for the reaction is, 269 kJ/mol

the answer is c

tell me if wrong