Part A Calculate the enthalpy of the reaction 2NO(g)+O2(g)?2NO2(g) given the fol

Question

Part A Calculate the enthalpy of the reaction 2NO(g)+O2(g)?2NO2(g) given the following reactions and enthalpies of formation:

12N2(g)+O2(g)?NO2(g),   ?H?A=33.2 kJ

12N2(g)+12O2(g)?NO(g),  ?H?B=90.2 kJ

Express your answer with the appropriate units. ?H? = ____value_____   _____units______

Part B Calculate the enthalpy of the reaction 4B(s)+3O2(g)?2B2O3(s) given the following pertinent information:

B2O3(s)+3H2O(g)?3O2(g)+B2H6(g),   ?H?A=+2035 kJ

2B(s)+3H2(g)?B2H6(g),                            ?H?B=+36 kJ

H2(g)+12O2(g)?H2O(l),                            ?H?C=?285 kJ

H2O(l)?H2O(g),                                         ?H?D=+44 kJ

Express your answer with the appropriate units. ?H? = ____value_____   ______units_____

Explanation / Answer

Solution :- To calculate the enthalpy change associated with the desired reaction we need to use the enthalpy change values of the other given reactions and then rearrange the given equations so that by adding those equations we get the desired reaction equation.

We can use the Hess

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