What Is the Reaction for the Standard Enthalpy of Formation

question 73

Multiple Choice

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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Definitions:

Reduction Of

A decrease in amount, size, intensity, or the number of something, often referring to cost, price, or rates.

Increase

A rise in quantity, size, value, or extent.

Percent

A proportion or share in a whole, expressed as a fraction of 100.

Percentage Less

The reduced amount expressed as a fraction of a hundred.