The first reaction in the Ostwald process for the production of nitric acid involves the combustion of ammonia 4NH3(g)+5O2(g)=4NO(g)+6H2O(g)

a) Estimate ΔH^o (in kJ) for this reaction using average bond energies.

b) Calculate ΔH^o (in kJ) for this reaction using standard heats of formation.

c) Briefly explain why the value for ΔH^o, calculated using average bond energies, is only considered to be an estimate of the standard enthalpy change for the reaction

Explanation:

Given that;

The chemical equation for the reaction is:

↔

a).

Using average bond energies;

For Bonds broken, we have:

4 × 3 N - H = 12 mol × 391 kJ/mol = 4692 kJ

5 × O = O = 5 mol × 498   kJ/mol =  2490 kJ    

            = 7182  kJ

For Bonds formed, we have:

4 × N = O = 4 mol × - 607 kJ/mol = -2428 kJ

6 × 2 O - H = 12 mol × - 467 kJ/mol = - 5604 kJ

               = - 8032 kJ

Therefore;

b) Using Standard heats of formation;

c) The value of ΔH^o, calculated using average bond energies, is only considered to be an estimate of the standard enthalpy change for the reaction because there is a premise in the calculation that all the bonds broken in the reactant and all bonds are formed in products. Meanwhile, only little bonds are broken, and only little bonds are formed during the reaction.

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

i'm assuming that it's c.) red bank..