on: 4) Using the data below answer the following questions about the reactio 6H2
ID: 698787 • Letter: O
Question
on: 4) Using the data below answer the following questions about the reactio 6H2O® + 4 NOg_ 502 (g) + 4 NH3 DATA: Std Entropy of Formation Std Enthalpy of Formation (J/mole/K) (kJ/ mole) NHs (g) 02 (g) H20g) 192.8 205.2 188.8 210:8 -46.19 0.0 -241.85 +91.3 4a) Compute the AHran for 4b) Is the reaction endothermic or exothermic? Why? The reaction is endo-turmi, beea 4c) What is the no for the reverse reaction? H(xA's (-1-si.lt365 . 2). (-1$4.1b)1-901. 141.De is eou.3 All answers must be developed and boxed below with each part in order an exotulon fecction .Explanation / Answer
4a)
dH rxn = dH products - dH reactants
dH rxn = [5* dHf O2 + 4*dH NH3] - [6*dH H2O + 4*dH NO]
dH rxn = [5* 0 + 4*-46.19] - [6*-241.85 + 4*91.3]
dH rxn = -184.76 - 1085.9
dH rxn = -1270.66 kJ/mol
4b) It is exothermic reaction.
dH is neagtive it means heat released out
4c)
dH rxn for reverse reaction = + 1270.66 kJ/mol
now it would be endothermic reaction.
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