Energy is absorbed by the molecules.
Answer: The most abundant gas in the atmosphere is nitrogen.
Explanation:
The Earth’s atmosphere is composed of approximately 78 percent nitrogen, 21 percent oxygen, 1 percent argon and trace amounts of other gases that include carbon dioxide and neon.
<span>S(s)+O2(g)→SO2(g), ΔHâ = -296.8kJ
SO2(g)+12O2(g)→SO3(g) , ΔHâ = -98.9kJ
H2(g) + 1/2 O2 (g) --------> H2O(l)ΔHâf = -285.8kJ
SO3(g) + H2O(l) --------> H2SO4, ΔHâ = -227.8 kJ .
All above steps are involved in the formation of H2SO4, therefore delta Hf for H2SO4 is [ -296.8+ (-98.9)+ (-285.8) +(-227.8)] = - 909.3 kj/mol
The energy required to form 1 mol H2SO4 fom its elements is - 909.3 kj / mol</span>
The heat of formation of nitrogen (II) oxide : +91.3 kJ/mol
<h3>Further explanation</h3>
Given
Reaction
N2(g) + O2(g) + 182.6 kJ → 2 NO(g)
Required
The heat of formation
Solution
In the above reaction, the heat of the reaction is located on the reactant side which indicates that the formation of nitric oxide requires heat (endothermic reaction).
In the above reaction the heat required to form 2 moles of NO, so the heat required for each mole is:
+182.6 kJ : 2 = =+91.3 kJ/mol
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