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Which of the following chemical equations does not correspond to a standard molar enthalpy of formation? C(s) 1/2 O2(g) CO(g) SO2(g) 1/2 O2(g) SO3(g) H2(g) 1/2 O2(g) H2O(l) N2(g) 2 O2(g) N2O4(g) Ca(s) C(s) 3/2 O2(g) CaCO3(s)

Which of the following chemical equations does not correspond to a standard molar enthalpy of formation? C(s) 1/2 O2(g) CO(g) SO2(g) 1/2 O2(g) SO3(g) H2(g) 1/2 O2(g) H2O(l) N2(g) 2 O2(g) N2O4(g) Ca(s) C(s) 3/2 O2(g) CaCO3(s)

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Which of the following chemical equations does not correspond to a standard molar enthalpy of formation?
C ( s ) 1 / 2 O 2 ( g ) C O ( g )
S O 2 ( g ) 1 / 2 O 2 ( g ) ® S O 3 ( g )
H 2 ( g ) 1 / 2 O 2 ( g ) ® H 2 O ( l )
N 2 ( g ) 2 O 2 ( g ) ⊛ N 2 O 4 ( g )
C a ( s ) C ( s ) 3 / 2 O 2 ( g ) R C a C O 3 ( s )

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