Calculate ∆? for the following reactions by balancing them and using values of ∆f? from the...
Calculate ∆? for the following reactions by balancing them and using values of ∆f? from the textbook:
(A) Complete combustion of ethanol in oxygen.
(B) Decomposition of solid ammonium chloride to gaseous ammonia and hydrogen chloride.
Homework Answers
A. C2H5OH(l) + 3O2(g) ------------> 2CO2(g) + 3H2O(l)
∆? = ∆?0f products - ∆?0f reactants
= 3*-285.83+2*-393.5-(-277.67 + 3*0)
= -1367KJ/mole
b.
NH4Cl(s) ---------> HCl(g) + NH3(g)
∆? = ∆?0f products - ∆?0f reactants
= -46.11-92.3-(-314.43)
= 176.02KJ/mole
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