Industrial production of nitric acid, which is used in many products including fertilizers and explosives, approaches 10 billion kg per year worldwide. the first step in its production is the exothermic oxidation of ammonia, represented by the following equation. 4 nh3(g) + 5 o2(g) → 4 no(g) + 6 h2o(g) δh⁰rxn = −902.0 kj if this reaction is carried out using 7.056 ✕ 103 g nh3 as the limiting reactant, what is the change in enthalpy?

Explanation:

The balanced chemical equation :

To calculate the moles, we use the equation:

According to stoichiometry:

4 moles of produces = 902.0 kJ of energy

415.1 moles of produces = of energy

Thus the change in enthalpy is

a

explanation:

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.