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Questions 4 through 7 refer to the following experiment: 0.500 g of Ca metal is added to 50.0 mL of 1.0 M HCI. Once the reaction is complete, the temperature of the solution has risen from 25.2°C to 71.4°C. This reaction proceeds by the following chemical equation: Ca(s) + 2 H+ (aq) --> Ca²+ (aq) + H₂(g) What is the temperature change of the solution? Type your numerical answer, without units, in the space provided below. 46.2 QUESTION 5 What is the heat lost by the reaction, in units of kilojoules (kJ)? Assume that the density of the solution is 1.000 g/mL, and that the volume of the HCI does not change when the Ca metal is added. The specific heat of water is 4.184 J/(g-°C). Type your numerical answer (3 sig figs) in the space provided. Your answer should be reported in units of kJ, but DO NOT include the units in the answer you type! Remember to type the algebraic sign of your answer (+ or -), since this is important in calorimetry! 9.67 QUESTION 6 How many moles of Ca were used in this reaction? Remember, 0.500 g of Ca was added to the HCI solution. Type your numerical answer, without units in the space provided. Include 3 significant figures, and use the Blackboard format for scientific notation (2.67 x 10-5 should be typed as 2.67E-5). 0.0125 QUESTION 7 What is the heat of reaction per mole of Ca? Express your answer to 3 significant figures in units of kJ/mol. Be sure to include the algebraic sign (+ or -)!

Questions 4 through 7 refer to the following experiment: 0.500 g of Ca metal is added to 50.0 mL of 1.0 M HCI. Once the reaction is complete, the temperature of the solution has risen from 25.2°C to 71.4°C. This reaction proceeds by the following chemical equation: Ca(s) + 2 H+ (aq) --> Ca²+ (aq) + H₂(g) What is the temperature change of the solution? Type your numerical answer, without units, in the space provided below. 46.2 QUESTION 5 What is the heat lost by the reaction, in units of kilojoules (kJ)? Assume that the density of the solution is 1.000 g/mL, and that the volume of the HCI does not change when the Ca metal is added. The specific heat of water is 4.184 J/(g-°C). Type your numerical answer (3 sig figs) in the space provided. Your answer should be reported in units of kJ, but DO NOT include the units in the answer you type! Remember to type the algebraic sign of your answer (+ or -), since this is important in calorimetry! 9.67 QUESTION 6 How many moles of Ca were used in this reaction? Remember, 0.500 g of Ca was added to the HCI solution. Type your numerical answer, without units in the space provided. Include 3 significant figures, and use the Blackboard format for scientific notation (2.67 x 10-5 should be typed as 2.67E-5). 0.0125 QUESTION 7 What is the heat of reaction per mole of Ca? Express your answer to 3 significant figures in units of kJ/mol. Be sure to include the algebraic sign (+ or -)!

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 64QAP
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Questions 4 through 7 refer to the following experiment: 0.500 g of Ca metal is added to 50.0 mL of 1.0 M HCI. Once the reaction is complete, the temperature of the solution has risen from 25.2°C to 71.4°C. This reaction proceeds by the following chemical equation: Ca(s) + 2 H+ (aq) Ca²+ (aq) + H2(g) What is the temperature change of the solution? Type your numerical answer, without units, in the space provided below. 46.2 --> QUESTION 5 What is the heat lost by the reaction, in units of kilojoules (kJ)? Assume that the density of the solution is 1.000 g/mL, and that the volume of the HCI does not change when the Ca metal is added. The specific heat of water is 4.184 J/(g.°C). Type your numerical answer (3 sig figs) in the space provided. Your answer should be reported in units of kJ, but DO NOT include the units in the answer you type! Remember to type the algebraic sign of your answer (+ or -), since this is important in calorimetry! 9.67 QUESTION 6 How many moles of Ca were used in this reaction? Remember, 0.500 g of Ca was added to the HCI solution. Type your numerical answer, without units in the space provided. Include 3 significant figures, and use the Blackboard format for scientific notation (2.67 x 10-5 should be typed as 2.67E-5). 0.0125 QUESTION 7 What is the heat of reaction per mole of Ca? Express your answer to 3 significant figures in units of kJ/mol. Be sure to include the algebraic sign (+ or -)!
Transcribed Image Text:Questions 4 through 7 refer to the following experiment: 0.500 g of Ca metal is added to 50.0 mL of 1.0 M HCI. Once the reaction is complete, the temperature of the solution has risen from 25.2°C to 71.4°C. This reaction proceeds by the following chemical equation: Ca(s) + 2 H+ (aq) Ca²+ (aq) + H2(g) What is the temperature change of the solution? Type your numerical answer, without units, in the space provided below. 46.2 --> QUESTION 5 What is the heat lost by the reaction, in units of kilojoules (kJ)? Assume that the density of the solution is 1.000 g/mL, and that the volume of the HCI does not change when the Ca metal is added. The specific heat of water is 4.184 J/(g.°C). Type your numerical answer (3 sig figs) in the space provided. Your answer should be reported in units of kJ, but DO NOT include the units in the answer you type! Remember to type the algebraic sign of your answer (+ or -), since this is important in calorimetry! 9.67 QUESTION 6 How many moles of Ca were used in this reaction? Remember, 0.500 g of Ca was added to the HCI solution. Type your numerical answer, without units in the space provided. Include 3 significant figures, and use the Blackboard format for scientific notation (2.67 x 10-5 should be typed as 2.67E-5). 0.0125 QUESTION 7 What is the heat of reaction per mole of Ca? Express your answer to 3 significant figures in units of kJ/mol. Be sure to include the algebraic sign (+ or -)!
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