Use the following data to calculate the standard enthalpy of formation of solid strontium carbonate SrCO3...
Use the following data to calculate the standard enthalpy of
formation of solid strontium carbonate
SrCO3 (s) → SrO (s) +
CO2(s) ΔH° = 234 kJ/mol
ΔHf° of CO2 (g) = -394
kJ/mol ΔHf° of SrO(s) = -592
kJ/mol
A) -752 kJ
B) 752 kJ
C) -1220 kJ
D) -1812 kJ
E) 1812 kJ
f) 1220
Homework Answers
Given:
ΔHo rxn = 234.0 KJ/mol
Hof(SrO(s)) = -592.0 KJ/mol
Hof(CO2(g)) = -394.0 KJ/mol
Balanced chemical equation is:
SrCO3(s) ---> SrO(s) + CO2(g)
ΔHo rxn = 1*Hof(SrO(s)) + 1*Hof(CO2(g)) - 1*Hof( SrCO3(s))
234.0 = 1*(-592.0) + 1*(-394.0) - 1*Hof(SrCO3(s))
Hof(SrCO3(s)) = -1220 KJ
Answer: C
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