We are asked how many kilojoules of heat are absorbed when 40.5 g of MgO(s) is decomposed into Mg(s) and O2 (g) at constant pressure
Molar Mass MgO = 40.31 g/mol
We are asked for the heat absorbed so the ΔH should be positive.
Consider the following reaction:
2Mg(s) + O2 (g) → 2MgO(s) ΔH = - 1204
How many kilojoules of heat are absorbed when 40.5 g of MgO(s) is decomposed into Mg(s) and O2 (g) at constant pressure?
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 Thermochemical Equations concept. You can view video lessons to learn Thermochemical Equations. Or if you need more Thermochemical Equations practice, you can also practice Thermochemical Equations practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Denton's class at MEC CUNY.