Question

Help - confusion :( The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process,

Answer 1

This is the answer for the question above:

In order to solve this, first use stoichiometry for the energy in kJ released by, converting grams of CuO2 to moles: 

56.96g*(1 mole/143.09 g)=0.41904 moles of Cu2O 

2 moles of Cu2O=-292.0kJ Convert 0.41904 moles of Cu2O to kJ. 


Finally, solve for kJ: 

0.41904 moles of Cu2O*(-292.0kJ/2 moles of Cu2O)=-61.18 kJ of energy released