Answers: 1
![\Delta H_{rxn}=\sum [n\times \Delta H_f_{(product)}]-\sum [n\times \Delta H_f_{(reactant)}]](/tpl/images/0383/2489/18a63.png)
![\Delta H_{rxn}=[(4\times \Delta H_f_{(NO(g))})+(6\times \Delta H_f_{(H_2O(g))})]-[(4\times \Delta H_f_{(NH_3(g))})+(5\times \Delta H_f_{(O_2)})]](/tpl/images/0383/2489/02e37.png)
![\Delta H_{rxn}=[(4\times (91.3))+(6\times (-241.8))]-[(4\times (-45.9))+(5\times (0))]\\\\\Delta H_{rxn}=-902kJ](/tpl/images/0383/2489/6f6da.png)
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Gthe following reaction is the first step in the production of nitric acid from ammonia. 4nh3(g) 5o2...
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