Problem: Choose the reaction that represents ΔH°f for Ca(NO3)2a. Ca2+(aq) + 2NO3-(aq) → Ca(NO3)2(aq)b. Ca(s) + 2N(g) + 6O(g) → Ca(NO3)2(s)c. Ca(NO3)2(aq) → Ca2+(aq) 2NO3-(aq)d. Ca(s) + N2(g) + 3O2(g) → Ca(NO3)2(s)e. Ca(NO3)2(s) → Ca(s) + N2(g) + 3O2(g)

FREE Expert Solution

We’re being asked to determine the balanced chemical equation for the reaction used to calculate the standard enthalpy of formation of Ca(NO3)2(s).


Recall that the standard enthalpy of formation (ΔH˚f) refers to the enthalpy change for the formation of 1 mole of a compound from its elements in their standard states.


83% (454 ratings)
View Complete Written Solution
Problem Details

Choose the reaction that represents ΔH°f for Ca(NO3)2

a. Ca2+(aq) + 2NO3-(aq) → Ca(NO3)2(aq)

b. Ca(s) + 2N(g) + 6O(g) → Ca(NO3)2(s)

c. Ca(NO3)2(aq) → Ca2+(aq) 2NO3-(aq)

d. Ca(s) + N2(g) + 3O2(g) → Ca(NO3)2(s)

e. Ca(NO3)2(s) → Ca(s) + N2(g) + 3O2(g)

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 Nafshun's class at OREGONSTATE.