20. The chemical equation for the reaction between hydrochloric acid and sodium hydroxide is HCI(aq) + NaOH(aq) → NaCl(aq) + H2O(1) When 25 mL of 1.0 M HCl (36.5 g/mol) is mixed with 25 mL of 1.0 M NaOH (40 g/mol), the temperature change of the mixture is 6.9 °C. The density of the mixture is 1.00 g/mL and the specific heat of the solution is 4.18 J/ g °C. What is the enthalpy change for this reaction? а. -1.4 kJ b. -29 kJ с. 29 kJ d. -58 kJ

20. The chemical equation for the reaction between hydrochloric acid and sodium hydroxide is HCI(aq) + NaOH(aq) → NaCl(aq) + H2O(1) When 25 mL of 1.0 M HCl (36.5 g/mol) is mixed with 25 mL of 1.0 M NaOH (40 g/mol), the temperature change of the mixture is 6.9 °C. The density of the mixture is 1.00 g/mL and the specific heat of the solution is 4.18 J/ g °C. What is the enthalpy change for this reaction? а. -1.4 kJ b. -29 kJ с. 29 kJ d. -58 kJ

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter8: Thermochemistry

Section: Chapter Questions

Problem 7QAP: Magnesium sulfate is often used in first-aid hot packs, giving off heat when dissolved in water. A...

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