What is the reaction for the standard enthalpy of formation for CdSO₄(s)? (Cd(s)is the stable form of cadmium. ) A)Cd(NO₃)₂(aq)+ H₂SO₄(aq)→ 2 HNO₃(aq)+ CdSO₄(s) B)Cd²⁺(aq)+ 2 SO₄^2-(aq)→ CdSO₄(s) C)Cd(s)+ 1/8 S₈ (s)+ 2O₂(g)→ CdSO₄(s) D)CdO(s)+ SO₃(l)→ CdSO₄(s) E)Cd(s)+ 1/8 S₈ (s)+ 4O(g)→ CdSO₄(s)

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Quizplus · Accepted Answer

The reaction given in choice C represents the standard enthalpy of formation for CdSO₄(s). It shows the formation of CdSO₄(s) from its constituent elements in their standard states, which is what the standard enthalpy of formation measures. The other choices represent different reactions and are not relevant to the standard enthalpy of formation for CdSO₄(s).

What Is the Reaction for the Standard Enthalpy of Formation