Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

How do ice packs work chemistry

25/10/2021 Client: muhammad11 Deadline: 2 Day

Lab5 Questions

Lab 5: Chemical Processes
INSTRUCTIONS:
· On your own and without assistance, complete this Lab 5 Answer Form electronically and submit it via the Assignments Folder by the date listed on your Course Schedule (under Syllabus).
· To conduct your laboratory exercises, use the Laboratory Manual that is available in the WebTycho classroom (Reserved Reading or provided by your instructor) or at the eScience Labs Student Portal. Laboratory exercises on your CD may not be updated.
· Save your Lab 5 Answer Form in the following format: LastName_Lab5 (e.g., Smith_Lab5).
· You should submit your document in a Word (.doc or .docx) or Rich Text Format (.rtf) for best compatibility.
Pre-lab Questions
1. Define enthalpy.

Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure. The enthalpy is the preferred expression of system energy changes in many chemical, biological, and physical measurements, because it simplifies certain descriptions of energy transfer. This is because a change in enthalpy takes account of energy transferred to the environment through the expansion of the system under study.

2. What is the relationship between the enthalpy of a reaction and its classification as endothermic or exothermic?

Endothermic reactions draw heat in from their surroundings. Exothermic reactions give heat off to their surroundings.

Endothermic :

· Energy is drawn in from the external environment, causing its surroundings to loose heat, or "cool down."

· The endothermic chemical reaction creates a product that has a higher energy level than the original materials, causing the reactant's stored energy to decrease. (In scientific terms, the reactants have "less total enthalpy" than the product.)

· The resulting product of the reaction is less stable because, the higher the energy bond, the less strength its molecules possess.

· Most endothermic reactions are not spontaneous.

Exothermic

· Exothermic chemical reactions cause their surroundings to warm up by giving off heat.

· The reactants contain more stored energy than the product because energy from external sources is not required, but given off. This gives the product more stability due to the lower amount of energy needed. (In this case, the reactants have a "greater total enthalpy" than the product.)

· Exothermic reactions are usually spontaneous.

3. With instant hot compresses, calcium chloride dissolves in water and the temperature of the mixture increases. Is this an endothermic or exothermic process? Exothermic Process

image1.emfExperiment 1: Cold Packs vs. Hand Warmers
Time (sec)
Temp. (°C)
Initial
30
60
90
120
150
180
210
240
270
*300
330
360
390
420
450
Minimum Temp (°C):
Time (sec)
Temp. (°C)
Initial
30
60
90
120
150
180
210
240
270
*300
330
360
390
420
450
Minimum Temp (°C):
Graph your data from the tables. You may create the graph on any program, but make sure it can be integrated into this document.
Questions
1. Calculate the overall temperature change for the cold and hot pack substance. HINT: This is the difference in the maximum temperature and minimum temperature of each.
Cold pack ΔT:

Hand warmer ΔT:

2. Which pack works by an exothermic process? Use experimental data to support your answer.

The chemical reaction that releases heat is called an exothermic reaction, so a heat pack. The cold pack is endothermic

3. Which pack works by an endothermic process? Use experimental data to support your answer.

The cold pack is endothermic because Energy is drawn in from the external environment, causing its surroundings to loose heat, or "cool down."

4. Which pack had the greatest change in enthalpy? How do you know?

Table 2: Hand Warmer Data

Table 1: Cold Pack Data

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Finance Homework Help
Coursework Help Online
Quick N Quality
Financial Analyst
Accounting & Finance Mentor
Engineering Mentor
Writer Writer Name Offer Chat
Finance Homework Help

ONLINE

Finance Homework Help

I am an elite class writer with more than 6 years of experience as an academic writer. I will provide you the 100 percent original and plagiarism-free content.

$39 Chat With Writer
Coursework Help Online

ONLINE

Coursework Help Online

I have read your project details and I can provide you QUALITY WORK within your given timeline and budget.

$36 Chat With Writer
Quick N Quality

ONLINE

Quick N Quality

I am an elite class writer with more than 6 years of experience as an academic writer. I will provide you the 100 percent original and plagiarism-free content.

$28 Chat With Writer
Financial Analyst

ONLINE

Financial Analyst

I will provide you with the well organized and well research papers from different primary and secondary sources will write the content that will support your points.

$50 Chat With Writer
Accounting & Finance Mentor

ONLINE

Accounting & Finance Mentor

I will be delighted to work on your project. As an experienced writer, I can provide you top quality, well researched, concise and error-free work within your provided deadline at very reasonable prices.

$36 Chat With Writer
Engineering Mentor

ONLINE

Engineering Mentor

I am a PhD writer with 10 years of experience. I will be delivering high-quality, plagiarism-free work to you in the minimum amount of time. Waiting for your message.

$18 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

The inn of lost time questions - 8 bandicoot lane mylor - Selection rule for vibrational transitions - Kiama tree top walk - Math mammoth light blue series - School Nursing - How much would it cost for someone to do a discussion for me? - Hotels near taylor university - Sample cover letter for healthcare professional - The bridge church halloween - Who can administer the mcmi iv - What is the future of strategic planning and management personnel in a business environment? - Disney's america theme park case study - Hr case study with solution ppt - Philosophy begins in wonder meaning - Vce theatre studies playlist 2021 - Best cv template for data analyst - A terre wilfred owen analysis - As 2293.1 free download - I need SWOT, Pestel and Marketing Analysis of Toyota Motors - Restaurant management system project report doc - Moorfield primary school vle - Bloodchild octavia butler discussion questions - Big Data Analysis of a company - If you were to be sent to the moon, which of your physical properties would be altered noticeably? - Was george harrison stabbed - How many kg is 40 pounds - Assignment - Criticism of natural law - Next week super discount airlines has a flight - Book review - High dependency unit edinburgh royal infirmary - Happy birthday in norwegian - Human population ecology cemetery lab answers - Stages of skill acquisition - Teamwork - Bhp employee share scheme - Paper - Identifying an unknown substance lab - List of nursing diagnosis 2018 - Examples of success criteria - 1.16 unit test basic tools and transformations part 1 - Street level bureaucracy summary - What is the parent company of chipotle - Batteries series vs parallel - Difference between strategic operational and tactical planning - Anatomy of a wave - Molecular geometry test questions - Order 2211125: Research Methods - Library unimelb past exams - Electron transfer diagram worksheet - Kiowa the things they carried - Lintel span table australia - Plan Program Performance Management 2 - Where a spring or river begins - How are biography writing services evolving in 2025? - Indiana plagiarism test answers 2019 - Buffer solution ph 10 sds - Economic - April 26 2009 calendar - Art- Julie Mehretu - What is safe harbor nursing texas - Class c amplifier operation - Webmail ucl ac uk - Edexcel gcse geography b unit 1 dynamic planet past papers - Cockatiel for sale toowoomba - Tennant street surgery stockton on tees - Left hydrocelectomy icd 10 pcs - 2010 economics hsc answers - Interviews and Interrogations CRJ-573 - PowerPoint Presentation - Financial and strategic management mcq - Management information system short question answer - MHA500 Discussion, and 2 papers - Poetry should ride the bus - Data mining : False discovery rate (FDR ) and relation ship between Type I and Type II errors - Answer only 4 questions - Http www pbs org wgbh nova lostempires roman day html - If a substance is completely consumed in a chemical reaction - Roland characteristics in the song of roland - Access 2016 module 1 sam project 1a - Certificate in community interpreting level 1 - Product Description - Setting up your own business reading answer - How does teamwork influence innovation at ideo - Turns out all my mistakes were forgivable - Purnell model for cultural competence - The two fundamental qualitative characteristics of accounting information are - Investment in total net operating capital - E commerce solutions using iis architecture - Too big to fail movie discussion questions - Easa amc 20 27 - X 2 1 n reduction formula - Apple cider vinegar enema for hemorrhoids - Why does ammeter connected in series - 10 gulli court mount claremont - Bbc world news anchors - Marketing Analysis Research - The spleen poem analysis - 10 things i hate about you mandella