Problem: The decomposition of ZnCO3(s) into ZnO(s) and CO2(g) at constant pressure requires the addition of 71.5 kJ of heat per mole of ZnCO3.Choose an enthalpy diagram for the reaction.

🤓 Based on our data, we think this question is relevant for Professor Costanza's class at USF.

FREE Expert Solution

Recall that:

  • ΔHrxn > 0 → endothermic → gains heat
  • ΔHrxn < 0 → exothermic → releases heat


Since decomposition of ZnCO3(s) requires addition of heat → endothermic reaction:

  • ΔHrxn = Hfproducts - Hfreactants
  • Hfproducts > Hfreactants → ΔHrxn > 0


View Complete Written Solution
Problem Details

The decomposition of ZnCO3(s) into ZnO(s) and CO2(g) at constant pressure requires the addition of 71.5 kJ of heat per mole of ZnCO3.

Choose an enthalpy diagram for the reaction.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Costanza's class at USF.