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Given the Standard Enthalpies of Formation for the Following Substances         ~~~~~~~~

Question 122

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Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction.

2N2H4(g)  Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction.  2N<sub>2</sub>H<sub>4</sub>(g)   2NO<sub>2</sub>(g)   3N<sub>2</sub>(g)   4H<sub>2</sub>O(g)  ~~~~~~~~\Delta H<sub>rxn</sub> = ? kJ  Substance ~~~~~~~~\Delta H   in kJ/mol  ~ ~~~~~ N<sub>2</sub>H<sub>4</sub>(g) ~~~~~~~~ +95.4  ~~ ~~~~ NO<sub>2</sub>(g) ~~~~~ ~~~ ~ +33.1  ~~~~ ~~ H<sub>2</sub>O(g) ~~~~~~~~ -241.8 2NO2(g)  Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction.  2N<sub>2</sub>H<sub>4</sub>(g)   2NO<sub>2</sub>(g)   3N<sub>2</sub>(g)   4H<sub>2</sub>O(g)  ~~~~~~~~\Delta H<sub>rxn</sub> = ? kJ  Substance ~~~~~~~~\Delta H   in kJ/mol  ~ ~~~~~ N<sub>2</sub>H<sub>4</sub>(g) ~~~~~~~~ +95.4  ~~ ~~~~ NO<sub>2</sub>(g) ~~~~~ ~~~ ~ +33.1  ~~~~ ~~ H<sub>2</sub>O(g) ~~~~~~~~ -241.8 3N2(g)  Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction.  2N<sub>2</sub>H<sub>4</sub>(g)   2NO<sub>2</sub>(g)   3N<sub>2</sub>(g)   4H<sub>2</sub>O(g)  ~~~~~~~~\Delta H<sub>rxn</sub> = ? kJ  Substance ~~~~~~~~\Delta H   in kJ/mol  ~ ~~~~~ N<sub>2</sub>H<sub>4</sub>(g) ~~~~~~~~ +95.4  ~~ ~~~~ NO<sub>2</sub>(g) ~~~~~ ~~~ ~ +33.1  ~~~~ ~~ H<sub>2</sub>O(g) ~~~~~~~~ -241.8 4H2O(g)         ~~~~~~~~Δ\Delta Hrxn = ? kJ

Substance         ~~~~~~~~Δ\Delta H  Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction.  2N<sub>2</sub>H<sub>4</sub>(g)   2NO<sub>2</sub>(g)   3N<sub>2</sub>(g)   4H<sub>2</sub>O(g)  ~~~~~~~~\Delta H<sub>rxn</sub> = ? kJ  Substance ~~~~~~~~\Delta H   in kJ/mol  ~ ~~~~~ N<sub>2</sub>H<sub>4</sub>(g) ~~~~~~~~ +95.4  ~~ ~~~~ NO<sub>2</sub>(g) ~~~~~ ~~~ ~ +33.1  ~~~~ ~~ H<sub>2</sub>O(g) ~~~~~~~~ -241.8 in kJ/mol
      ~ ~~~~~ N2H4(g)         ~~~~~~~~ +95.4
      ~~ ~~~~ NO2(g)       ~~~~~ ~   ~~ ~ +33.1
      ~~~~ ~~ H2O(g)         ~~~~~~~~ -241.8

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