8. Instant cold packs can be made from ammonium nitrate by mixing/reacting it with water (reaction shown below). When 1.25 g of NH4NO3 is dissolved in 25.0 g of water at 25.8 °C, the temperature of the water after the reaction is 21.9 °C. What is the enthalpy change (AH) for this reaction in units of kJ/mol of NH&NO3? The heat capacity of water is 4.18 g°C' NHNO3(s) → NH(aq) + NO5 (aq) (bp)- 9. How many grams of ammonium nitrate would be necessary to cause the water in the cold pack described in Question 8 to reach 3.0 °C from the original temperature of 25.8 °C?

8. Instant cold packs can be made from ammonium nitrate by mixing/reacting it with water (reaction shown below). When 1.25 g of NH4NO3 is dissolved in 25.0 g of water at 25.8 °C, the temperature of the water after the reaction is 21.9 °C. What is the enthalpy change (AH) for this reaction in units of kJ/mol of NH&NO3? The heat capacity of water is 4.18 g°C' NHNO3(s) → NH(aq) + NO5 (aq) (bp)- 9. How many grams of ammonium nitrate would be necessary to cause the water in the cold pack described in Question 8 to reach 3.0 °C from the original temperature of 25.8 °C?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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