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NCERT Class XI Chemistry Thermodynamics Solutions

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Question : 13
Total: 22
Given : N2(g)+3H2(g) → 2NH3(g) ; ΔrH° = –92.4 kJmol–1. What is the standard enthalpy of formation of NH3 gas?
Solution:  
N2(g)+3H2(g) → 2NH3(g) ; ΔrH° = –92.4 kJmol–1
∴ Standard enthalpy of formation of NH3(g) = {-92.4}/2$ = - 46.2 kJ/mol
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