Use what you know about Hess' Law to calculate (delta)H for the following reaction and select your answer from below. 2A(g) + 2B(g) - -> 2AB(g) Compound Standard Enthalpy of Formation (kJ/mole) A -150 B-75 AB 300 1050 kJ O O O O O 75 kJ -1050 kJ -75 kJ -525 kJ 525 kJ

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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**Hess' Law Calculation Exercise**

Use what you know about Hess' Law to calculate ΔH for the following reaction and select your answer from below.

**Reaction:**  
2A(g) + 2B(g) -> 2AB(g)

**Compound Standard Enthalpy of Formation (kJ/mole):**  
- A: -150 kJ/mol  
- B: -75 kJ/mol  
- AB: 300 kJ/mol

**Answer Choices:**  
- 1050 kJ  
- 75 kJ  
- -1050 kJ  
- -75 kJ  
- -525 kJ  
- 525 kJ

Use the standard enthalpy of formation values provided to apply Hess' Law and find the reaction enthalpy change, ΔH.
Transcribed Image Text:**Hess' Law Calculation Exercise** Use what you know about Hess' Law to calculate ΔH for the following reaction and select your answer from below. **Reaction:** 2A(g) + 2B(g) -> 2AB(g) **Compound Standard Enthalpy of Formation (kJ/mole):** - A: -150 kJ/mol - B: -75 kJ/mol - AB: 300 kJ/mol **Answer Choices:** - 1050 kJ - 75 kJ - -1050 kJ - -75 kJ - -525 kJ - 525 kJ Use the standard enthalpy of formation values provided to apply Hess' Law and find the reaction enthalpy change, ΔH.
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