# Problem: Given the following data:Calculate ΔH for the reaction On the basis of the enthalpy change, is this a useful reaction for the synthesis of ammonia?

###### FREE Expert Solution
83% (187 ratings)
###### FREE Expert Solution

We start solving this by setting up the equations according to the structures drawn

(1) 2NH3 (g) → N2 (g) + 3H(g)    ΔH°rxn = 92 kJ

(2) 2H2 (g) + O2 (g) → 2H2O (l)    ΔH°rxn = -484 kJ

To find the ΔHrxn of the third reaction, we need to use the Hess's Law where we have to rearrange the given equations to get the desired reaction.

83% (187 ratings)
###### Problem Details

Given the following data:

Calculate ΔH for the reaction

On the basis of the enthalpy change, is this a useful reaction for the synthesis of ammonia?

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 Hess's Law concept. You can view video lessons to learn Hess's Law Or if you need more Hess's Law practice, you can also practice Hess's Law practice problems .

How long does this problem take to solve?

Our expert Chemistry tutor, Rae-Anne took 9 minutes to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

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

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in . You can also practice practice problems .