28. Write the equation that corresponds to the standard enthalpy of formation for each of the following compounds: a) Nal(s), b) HCIO,(g), and c) CH;OCH;(g)

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**Question 28: Standard Enthalpy of Formation**

Write the equation that corresponds to the standard enthalpy of formation for each of the following compounds:

a) NaI(s)  
b) HClO₄(g)  
c) CH₃OCH₃(g)  

**Explanation:**

To solve this problem, you need to identify and write the chemical equations for the formation of each compound from its constituent elements in their standard states.

- **a) NaI(s):** Sodium iodine is formed from sodium (Na) and iodine (I₂) in their standard states.  
- **b) HClO₄(g):** Perchloric acid gas is formed from hydrogen (H₂), chlorine (Cl₂), and oxygen (O₂) in their standard states.  
- **c) CH₃OCH₃(g):** Dimethyl ether is formed from carbon (C), hydrogen (H₂), and oxygen (O₂) in their standard states.  

Each equation should be balanced to reflect the stoichiometry of the reaction.
Transcribed Image Text:**Question 28: Standard Enthalpy of Formation** Write the equation that corresponds to the standard enthalpy of formation for each of the following compounds: a) NaI(s) b) HClO₄(g) c) CH₃OCH₃(g) **Explanation:** To solve this problem, you need to identify and write the chemical equations for the formation of each compound from its constituent elements in their standard states. - **a) NaI(s):** Sodium iodine is formed from sodium (Na) and iodine (I₂) in their standard states. - **b) HClO₄(g):** Perchloric acid gas is formed from hydrogen (H₂), chlorine (Cl₂), and oxygen (O₂) in their standard states. - **c) CH₃OCH₃(g):** Dimethyl ether is formed from carbon (C), hydrogen (H₂), and oxygen (O₂) in their standard states. Each equation should be balanced to reflect the stoichiometry of the reaction.
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