Use the concept of thermochemistry and stoichiometry to determine ΔH of the reaction of 25 g Na2O2 upon reaction with water
It can be seen that 2 moles of Na2O2 produces -126 kJ of heat.
Calculating for the ΔH of the reaction:
For the following reaction, what is ∆H° when 25.0 g of Na2O2(molar mass = 77.98 g mol−1) is reacted with water?
2 Na2O2(s) + 2 H2O(l) → 4 NaOH(s) + O2(g) ∆H° = −126 kJ
(A) -20.2 kJ
(B) 87.4 kJ
(C) -126 kJ
(D) 20.2 kJ
(E) -87.4 kJ
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 Equation concept. You can view video lessons to learn Thermochemical Equation. Or if you need more Thermochemical Equation practice, you can also practice Thermochemical Equation practice problems.
What is the difficulty of this problem?
Our tutors rated the difficulty ofFor the following reaction, what is ∆H° when 25.0 g of Na2O2...as low difficulty.