Perchloric acid (HCIO4) and sodium hydroxide (NaOH) react to form water and aqueous sodium perchlorate (NaCIO4). When 50.0 mL of 2.50 M perchloric acid was mixed with 100.0 mL of 2.00 M sodium hydroxide in a calorimeter, the final temperature was 35.1° C. The initial temperature of both solutions was 24.1° C. Calculate the AHrxn for the formation of one mole of water in this reaction in kJ/mol. Assume all solutions have d = 1.00 g/mL and specific heat 4.18 J/g °C. -44 kJ/mol none of the answers are correct -55 kJ/mol 44 kJ/mol 55 kJ/mol

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**Problem Statement:**

Perchloric acid (HClO₄) and sodium hydroxide (NaOH) react to form water and aqueous sodium perchlorate (NaClO₄). When 50.0 mL of 2.50 M perchloric acid was mixed with 100.0 mL of 2.00 M sodium hydroxide in a calorimeter, the final temperature was 35.1°C. The initial temperature of both solutions was 24.1°C. Calculate the ΔH_rxn for the formation of one mole of water in this reaction in kJ/mol. Assume all solutions have a density (d) of 1.00 g/mL and specific heat capacity of 4.18 J/g°C.

**Options:**

- -44 kJ/mol
- none of the answers are correct
- -55 kJ/mol
- 44 kJ/mol
- 55 kJ/mol
Transcribed Image Text:**Problem Statement:** Perchloric acid (HClO₄) and sodium hydroxide (NaOH) react to form water and aqueous sodium perchlorate (NaClO₄). When 50.0 mL of 2.50 M perchloric acid was mixed with 100.0 mL of 2.00 M sodium hydroxide in a calorimeter, the final temperature was 35.1°C. The initial temperature of both solutions was 24.1°C. Calculate the ΔH_rxn for the formation of one mole of water in this reaction in kJ/mol. Assume all solutions have a density (d) of 1.00 g/mL and specific heat capacity of 4.18 J/g°C. **Options:** - -44 kJ/mol - none of the answers are correct - -55 kJ/mol - 44 kJ/mol - 55 kJ/mol
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