The enthalpy change at 1 atm of which reaction corresponds to the standard enthalpy of formation of solid calcium nitrate,Ca(NO3) 2?
A) Ca2+(g) + 2NO3-(g) → Ca(NO3) 2(s)
B) Ca(s) + N2(g) + 3O2(g) → Ca(NO3) 2(s)
C) Ca(g) + 2N(g) + 6O(g) → Ca(NO3) 2(s)
D) Ca(s) + N2(g) + 2O3(g) → Ca(NO3) 2(s)
E) Ca2+(aq) + 2NO3-(aq) → Ca(NO3) 2(s)
Correct Answer:
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