The chemical reaction for the formation of NH₃ is as below:
1/2 N₂(g) + 3/2 H₂(g) → NH₃(g)
According to the definition of standard Enthalpy of formation, the product and reactant must be present in their standard state. In the above reaction, the formation of ammonia gas can be produced by the reaction between the two abundant gases kne is nitrogen gas and the other is hydrogen gas. The product and reactant also shown in standard state.
From the reaction, we noticed that in ammonia one nitrogen atom. combined with three hydrogen atom. Since, one molecule of nitrogen contain two nitrogen atom. So, half of the mole of Nitrogen gas react with 3/2 of the moles of hydrogen gas to form one mole of ammonia gas.
Since, the reactant and product are present in same phase therefore it is termed as homogenous chemical equation.
Thus, we concluded that the chemical reaction for the formation of NH₃ is as below:
1/2 N₂(g) + 3/2 H₂(g) → NH₃(g)
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