Two Solutions, 50

question 42

Multiple Choice

Two solutions, 50.0 mL of 1.00 M BaCl₂(aq) and 50.0 mL of 1.00 M Na₂SO₄(aq) , both initially at 21.5°C, are added to a calorimeter with a total heat capacity, after the solutions are added, of 1.10 kJ/°C and the temperature rises to 22.7°C. Determine qrxn per mole of BaSO₄(s) formed in the reaction.

• A) -26.4 kJ/mol
• B) +26.4 kJ/mol
• C) -2.64 kJ/mol
• D) +2.64 kJ/mol

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