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6) Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic?

6) Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic?

Chemistry
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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6) Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic? 7) A 100.0 mL sample of 0.300 M NaOH is mixed with a 100.0 mL sample of 0.300 M HNO3 in a coffee cup calorimeter. If both solutions were initially at 35.00°C and the temperature of the resulting solution was recorded as 37.00°C, determine the AH°rxn (in units of kJ/mol NaNO3) for the neutralization reaction between aqueous NaOH and HNO3. Assume: 1) that no heat is lost to the calorimeter or the surroundings 2) that the density and the heat capacity of the resulting solution are the same as water. 8) The addition of hydrochloric acid to a silver nitrate solution precipitates silver chloride according to the reaction: AGNO3(aq) + HCl(aq) → AgCl(s) + HNO3(aq) you combine 50.0 mL of 0.100 M AGNO3 with 50.0 mL of 0.100 M HCI in a coffee-cup calorimeter, the temperature changes from 23.40 °C to 24.21 °C. Calculate AHxn for the reaction as written. Use 1.00 g/mL as the density of the solution and C = 4.18 J/g °C as the specific heat capacity. When
Transcribed Image Text:6) Dissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic? 7) A 100.0 mL sample of 0.300 M NaOH is mixed with a 100.0 mL sample of 0.300 M HNO3 in a coffee cup calorimeter. If both solutions were initially at 35.00°C and the temperature of the resulting solution was recorded as 37.00°C, determine the AH°rxn (in units of kJ/mol NaNO3) for the neutralization reaction between aqueous NaOH and HNO3. Assume: 1) that no heat is lost to the calorimeter or the surroundings 2) that the density and the heat capacity of the resulting solution are the same as water. 8) The addition of hydrochloric acid to a silver nitrate solution precipitates silver chloride according to the reaction: AGNO3(aq) + HCl(aq) → AgCl(s) + HNO3(aq) you combine 50.0 mL of 0.100 M AGNO3 with 50.0 mL of 0.100 M HCI in a coffee-cup calorimeter, the temperature changes from 23.40 °C to 24.21 °C. Calculate AHxn for the reaction as written. Use 1.00 g/mL as the density of the solution and C = 4.18 J/g °C as the specific heat capacity. When
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