Given the Following Experimental Data

question 75

Multiple Choice

Given the following experimental data:
D H rxn Ca (s) + 2 H₂ O ( ) Ca(OH) 2 (s) + H₂ (g) - 415.1 kJ 1 / 2 H₂ (g) + 1 / 2 Cl₂ 2 HCl (g) - 92.31 kJ CaCl₂ (s) + 2 H₂ O ( ) Ca(OH) 2 (s) + 2 HCl (g) 195.3 kJ What is the standard heat of formation ( D H f ) for CaCl₂ (s) ?

• A) - 795.0 kJ/mol
• B) - 311.3 kJ/mol
• C) - 116.8 kJ/mol
• D) +127.5 kJ/mol
• E) +702.6 kJ/mol

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