What Is the Reaction for the Standard Enthalpy of Formation

question 53

Multiple Choice

What is the reaction for the standard enthalpy of formation for Mn₂O₃(s) ?
(Mn(s) is the stable form of manganese. )

• A)Mn(s)+ 3/4 O₂(g)→ 1/2 Mn₂O₃(s)
• B)MnO(s)+ MnO₂(s)→ Mn₂O₃(s)
• C)2 Mn(s)+ O₃(g)→ Mn₂O₃(s)
• D)2 MnO(s)+ 1/2 O₃(g)→ Mn₂O₃(s)
• E)2Mn (s)+ 3/2 O₂ (g)→ Mn₂O₃(s)

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Definitions:

Net Operating Income

The financial gain a company receives from its essential business operations, prior to the removal of interest and tax costs.

Variable Costing

Variable costing is an accounting method that only includes variable production costs (direct materials, direct labor, and variable manufacturing overhead) in the cost of a product.

Net Operating Income

The total profit of a company after all operating expenses are subtracted from total revenues but before deducting taxes and interest.

Absorption Costing

An accounting method that includes all manufacturing costs - direct materials, direct labor, and both variable and fixed manufacturing overhead - in the cost of a unit of a product.