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E. A chemical change involves a change in the composition of matter-the formation of a new chemical substance (product) with physical and chemical properties different from those of the reactants. Describe the evidence used to decide if any of the processes in Part A were chemical changes. Did you observe any qualitative differences in the amount of heat generated in the reac- tions that were characterized as endothermic in Part A? Consider Reaction A: Was energy released or absorbed by the reactants in this system? When you touched the reaction container (the plastic bag) was energy being released or absorbed by your hand? Write a balanced equation for each of the processes in Part A. Remember to include heat on the reactant or product side, as appropriate.

E. A chemical change involves a change in the composition of matter-the formation of a new chemical substance (product) with physical and chemical properties different from those of the reactants. Describe the evidence used to decide if any of the processes in Part A were chemical changes. Did you observe any qualitative differences in the amount of heat generated in the reac- tions that were characterized as endothermic in Part A? Consider Reaction A: Was energy released or absorbed by the reactants in this system? When you touched the reaction container (the plastic bag) was energy being released or absorbed by your hand? Write a balanced equation for each of the processes in Part A. Remember to include heat on the reactant or product side, as appropriate.

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
Chapter8: Thermochemistry
Section: Chapter Questions
Problem 74QAP: In 2010, 3.30109 gallons of gasoline were consumed in the United States. The following assumptions...
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To ensure that you are not confused, I attached what the experiment was about. I highly recommend you read through it before going to the questions. file:///Users/michaelzheng/Downloads/ExploringEnergy%20(2).pdf Only answer Post lab questions 2-5 For number five, put the answers in the format stated in the background. Thank you.
Exploring Energy Changes Data Table A. Observing Heat Changes Reaction Solid + Liquid Mass of Solid (g) Observations Thesolid Cempletely dissolved. The soluien was ( 1e ice we ter.CAbuvemoom Culd endo. The Solid lissolveed uiih little excess led tbehind NH,CI(s) + H,O(1) 2.0269 A temperak. CacıĻ6) + 6-l9 H,O(1) 3.1 3.1641g very hot, exo. The solutien wAs NaHCO,(6) + HCl(aq) 271g Tesid Sizzle ataripicA pase er acidwas putin. Tle tempera mewasncutral enclo, C NaHCO,(s) + HCI(aq) Data Table B. Measuring Temperature vs. Time Assigned Reaction Identity of Solid Mass of Solid (g) Identity of Liquid Volume of Liquid (mL)
Transcribed Image Text:Exploring Energy Changes Data Table A. Observing Heat Changes Reaction Solid + Liquid Mass of Solid (g) Observations Thesolid Cempletely dissolved. The soluien was ( 1e ice we ter.CAbuvemoom Culd endo. The Solid lissolveed uiih little excess led tbehind NH,CI(s) + H,O(1) 2.0269 A temperak. CacıĻ6) + 6-l9 H,O(1) 3.1 3.1641g very hot, exo. The solutien wAs NaHCO,(6) + HCl(aq) 271g Tesid Sizzle ataripicA pase er acidwas putin. Tle tempera mewasncutral enclo, C NaHCO,(s) + HCI(aq) Data Table B. Measuring Temperature vs. Time Assigned Reaction Identity of Solid Mass of Solid (g) Identity of Liquid Volume of Liquid (mL)
Exploring Energy Changes-Page 6 Post-Lab Questions Attach the printout of the data table and graph for Part B to your lab report. 1. Complete the following Results Table to indicate whether each reaction in Part A repre- sents a physical or chemical change and whether it is exothermic or endothermic. Reaction Physical or Chemical Change? Exothermic or Endothermic? Physical Charge Physical ihangE Chemical.change Endothermi Exothermic A C Endathermicc 2. A chemical change involves a change in the composition of matter-the formation of a new chemical substance (product) with physical and chemical properties different from those of the reactants. Describe the evidence used to decide if any of the processes in Part A were chemical changes. 3. Did you observe any qualitative differences in the amount of heat generated in the reac- tions that were characterized as endothermic in Part A? 4. Consider Reaction A: Was energy released or absorbed by the reactants in this system? When you touched the reaction container (the plastic bag) was energy being released or absorbed by your hand? 5. Write a balanced equation for each of the processes in Part A. Remember to include heat on the reactant or product side, as appropriate. 6. In Part B, was the temperature that was measured a part of the
Transcribed Image Text:Exploring Energy Changes-Page 6 Post-Lab Questions Attach the printout of the data table and graph for Part B to your lab report. 1. Complete the following Results Table to indicate whether each reaction in Part A repre- sents a physical or chemical change and whether it is exothermic or endothermic. Reaction Physical or Chemical Change? Exothermic or Endothermic? Physical Charge Physical ihangE Chemical.change Endothermi Exothermic A C Endathermicc 2. A chemical change involves a change in the composition of matter-the formation of a new chemical substance (product) with physical and chemical properties different from those of the reactants. Describe the evidence used to decide if any of the processes in Part A were chemical changes. 3. Did you observe any qualitative differences in the amount of heat generated in the reac- tions that were characterized as endothermic in Part A? 4. Consider Reaction A: Was energy released or absorbed by the reactants in this system? When you touched the reaction container (the plastic bag) was energy being released or absorbed by your hand? 5. Write a balanced equation for each of the processes in Part A. Remember to include heat on the reactant or product side, as appropriate. 6. In Part B, was the temperature that was measured a part of the
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