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

Observation of melting point of ice

27/10/2021 Client: muhammad11 Deadline: 2 Day

States of Matter

Chelsey Grasham

Lab Report Assistant

Purpose: The purpose of this experiment was to determine melting and boiling points of certain substances.

Procedure: For this experiment, I collected different substances, heated them, boiled them, and observed them while recording data.

Conclusion: From this experiment, I learned that different substances have different boiling points and that the boiling/melting point of a substance can tell you about its identity.

Exercise 1: Determination of a Melting Point

Data Table 1. Melting Point of Tetradecanol.

Melting Point of Tetradecanol (°C)

Trial 1

38

Trial 2

39

Trial 3

40

Average of the 3 Trials

39

Questions

A. Describe your results for the melting point of tetradecanol. Were your results consistent? What was the range of values? My results remained fairly consistent and my values only ranged from 38-40 degrees Celsius.

B. Describe what occurs to the particles of a substance when the substance melts. Explain why this occurs. As a substance melts, the bonds begin to lose their strength and in turn, the substance turns into a liquid.

C. When performing this experiment, when is the tetradecanol in a condensed phase? Explain your answer. In this experiment, tetradecanol is in a condensed phase when it is a solid/going into the liquid stage. This must be due to the fact that the molecules are really close together.

D. Based on your observations of tetradecanol when it reformed a solid after melting, does tetradecanol form a crystalline or amorphous solid? Explain the difference between these two terms as part of your answer. I do not think tetradecanol is a crystalline solid because those kinds of solids usually go back to their solid form, from liquid the liquid form, in a very long time. This is not what happened. I believe it is a amorphous solid because it went back to a solid almost immediately.

E. Give some examples of how it might be useful to know the melting or boiling points of a substance. Think in terms of both scientific and commercial/industrial settings. Melting and boiling points are very important to know. For example, in commercial industries, like when jewelry is made, it is beneficial to know the melting points of the metals so they will be able to melt, and form the metals not jewelry. In a scientific point of view, it is important to know for safety and hazardous reasons.

F. Describe any possible sources of error for this exercise. Sources in error could include reading the thermometer incorrectly, setting the experiment up incorrectly, or not allowing things to heat for the time allowed.

Exercise 2: Temperature and Phase Changes

Data Table 2. Temperature and Observations for Heating Curve.

Time (Min)

Temperature (°C)

Observations

0

0

Starting point

1

6

Starting to change form around 25 seconds

2

9

70 percent liquid

3

15

90 percent liquid

4

30

100 percent liquid

5

55

Bubbles beginning to form

6

72

7

90

bubbling

8

99

Starting to boil really quickly

9

100

Beginning to steam

10

100

Condensation and steam forming

11

100

Condensation and steam forming

12

100

Condensation and steam forming

13

100

Condensation and steam forming

14

100

Condensation and steam forming

15

100

Condensation and steam forming

16

100

Condensation and steam forming

17

100

Condensation and steam forming

18

100

Condensation and steam forming

19

100

Condensation and steam forming

20

101

Still boiling

21

102

Still boiling

22

101

Less water, a lot of steam

23

100

Less water a lot of steam

24

100

Less water a lot of steam

25

101

Condensation and steam

26

101

Condensation and steam

27

100

Condensation and steam

28

101

Liquid getting less and less, steam

29

101

Steam and condensation

30

100

Almost no liquid, steam

Questions

A. Using the temperature data recorded in Data Table 2, create a heating curve.

· Plot time (minutes) on the x-axis (horizontal axis) and temperature (°C) on the y-axis (vertical axis). Connect the plotted points with a line.

· Label the heating curve to show each phase of matter (solid, solid + liquid, liquid, liquid + gas).

· Label the melting point and boiling point on the heating curve.

· Save an image of the graph.

· Resize and insert the image below.

·

Melting point

Note: An example heating curve is given in Figure 6 of the Background.

B. Are there parts of the curve with positive slopes and parts that are flat (slope of zero)? What states of matter are present when the slope of the heating curve is positive and what states of matter are present when the slope is zero or close to zero? The curve keeps a positive slope until it reaches the 8-9 minute mark, and at that point it begins to flatline. The slope is the ice as it goes from the sold to liquid form and from a liquid to a boil and then to a gas. When the slope is zero it is vaporizing.

C. Describe the key characteristics for the three states of matter. Solid: constant shape and volume, Liquid: No constant shape but constant volume, Gas: no constant shape or volume

D. Define the melting point. What was the observed melting point of water? The melting point is the temperature when the solid is completely turned into a liquid. The melting point of water is between 0-5 degrees Celsius.

E. Define boiling point. What was the observed boiling point of water? Boiling point is the temperature that is required to make a liquid start vaporizing or turning into a gas. The boiling point for water is 100 degrees Celsius

F. What happens to heat energy when it is not increasing the temperature of the substance in the beaker? Use your heating curve to explain your answer. This happens when the temperature reaches the boiling point and only increases maybe a few degrees, or none. This happened in the last 15 minutes and the energy was used to vaporize the water into gas.

G. Was temperature perfectly constant during your test while the water was melting and while it was boiling? Explain why or why not. The temperature was not perfectly constant. The temperature of the liquid increased until boiling 100 degrees Celsius.

H. The published melting point of H2O is 0°C, and the published boiling point is 100°C. Why may you have found different values? Altitude, accidentally adding more/not enough ice, incorrect reading of the thermometer.

I. Use the following information to determine if the intermolecular forces of isopropyl alcohol are greater or weaker than the intermolecular forces of water. Explain your answer. The melting point of isopropyl alcohol (rubbing alcohol, C3H8O) is about -90°C and the boiling point is about 82°C. I do think the IMF of rubbing alcohol are greater than water. I believe this because of the information provided.

Exercise 3: Observing Gas Properties - Flammability

Chemicals

Observations

HCl

Liquid, clear

Zn

Solid, gray, shiny

HCl + Zn Reaction

It bubbled at the bottom, the hydrochloric acid was still a clear liquid

Gas + Flame

When gas was added, a small fire appeared and the gas became ignited

Questions

A. In this experiment, there were two possible identities for the gas produced: hydrogen or chlorine, which have quite different properties. Hydrogen is a colorless, odorless, flammable gas. Chlorine gas is greenish yellow with a pungent, bleach-like odor and is non-flammable. Use your observations to determine which gas was produced in this experiment. Hydrogen gas was produced because there was a loud popping noise, an explosion

B. As gas moved into the pipet bulb, where did the water go? The gas forced the water out and to the test tube, and the gas replaced the water

C. Explain why the production of a gas in this experiment is or is not different from the formation of water vapor in the heating curve experiment. It is different, this is because unlike the heating curve, there was no heat applied to this experiment, and the experiment was a chemical reaction.

Heating Curve

Temperature © 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 6 9 15 30 55 72 90 99 100 100 100 100 100 100 100 100 100 100 100 101 102 101 100 100 101 101 100 101 101 100

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:

Study Master
Solutions Store
Quality Homework Helper
Unique Academic Solutions
Coursework Assignment Help
Quick N Quality
Writer Writer Name Offer Chat
Study Master

ONLINE

Study Master

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.

$17 Chat With Writer
Solutions Store

ONLINE

Solutions Store

I can assist you in plagiarism free writing as I have already done several related projects of writing. I have a master qualification with 5 years’ experience in; Essay Writing, Case Study Writing, Report Writing.

$42 Chat With Writer
Quality Homework Helper

ONLINE

Quality Homework Helper

I have worked on wide variety of research papers including; Analytical research paper, Argumentative research paper, Interpretative research, experimental research etc.

$48 Chat With Writer
Unique Academic Solutions

ONLINE

Unique Academic Solutions

I have worked on wide variety of research papers including; Analytical research paper, Argumentative research paper, Interpretative research, experimental research etc.

$37 Chat With Writer
Coursework Assignment Help

ONLINE

Coursework Assignment Help

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.

$25 Chat With Writer
Quick N Quality

ONLINE

Quick N Quality

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.

$23 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

Case study:Sutter health approach - St nicholas at wade parish council - Essay on learning to drive a car - Economic Impact of COVID in the US. - West indies yacht club resort when cultures collide analysis - Surah humazah for kids - Different types of factoring - Www dnai org d index html - Principles of advocacy in nursing - Measure of heat crossword - 7.2 3.7 lab troubleshooting advanced eigrp - Reading summary - Auditing - CMGT/445 - Organizes and codes patient records gathers statistical data - Economic Principles – Microeconomics - Tina jones shadow health - The curious researcher 6th edition pdf - Go float electric boat for sale - Scary tales by jackie torrence analyzing the text answers - IT question - Smith and cult palace in wonderland swatch - Opening skinner's box chapter 10 summary - Eleco ltd slot machine manual - Health Care week 9 - Sap tdms installation guide - Response - How to read paired t test results spss - Effects of Drug Abuse - Survey Proposal Assignment - Convert cm3 to ft3 - Dhanishta nakshatra pada 1 - Mit ocw single variable calculus - Allsp cdu - Bond energy calculations worksheet with answers pdf - Relational Stages - Write a select statement that returns three columns - Www armoredpenguin com crossword - Case study analysis introduction example - 6 nexus court mulgrave - Quiz week 1 banking a - Https www mindtools com pages article newldr_74 htm - Example of a self critique for speech - What is advertising execution - Mi familia y yo hemos llevado una vida sana. (me alegro de que) - Week 6 mind mapping - 403 governors place katy tx - Single phase semi controlled rectifier - Animal farm study guide questions answer key - Unit 4 legal and ethical responsibilities worksheet answers - In the nitrite ion no2 - Function of ammonia chamber in chromatography - The correct order of presentation in a classified balance sheet - Titration of acetic acid with naoh lab report - Part time courses nescol - The green cross code - Byte of accounting journal entries - Mcgraw hill connect accounting answers chapter 10 - Is pos a gatekeeper or open access - The supply curve for product x is given by - Threats of substitutes in the airline industry - Manual pipe rolling machine - Stephen hawking free will - Case study treatment plan sample - Capsim capstone strategies - OperationsManagementForLeaders_Assessment3 - Directional strategy - Sphygm o medical term - Fixed-time period models are used when demand is variable - Mcdonalds in russia case study - Breaking a social norm assignment - The new christian counselor summary - Data Discussion 2 - Finance 5 - Imperial camel corps badge for sale - Truma e2400 exhaust cap cover - Assignment Mini- Study Part I and Part II - What is an adjective phrase - What biome is nashville tennessee - 1988 martin sheen movie crossword clue - Marketing essentials assignment examples - Tim steinert alibaba net worth - Atmega328 internal pull up resistor - Heather dianne mcdonald cartersville ga autopsy reports - Ccrp certification exam questions - Organizational Leadership and Decision Making 6 - Tenable io user guide - International human resource management book pdf - Cell biology short answer questions - Corporate citizenship - Single wire earth return - Ethic - Dissimilar metals compatibility chart - Work experience booklet template - 2.09 m in feet - 18.2 hydropower and ocean energy quizlet - Explorelearning co uk writersawards story dice - Extracting salicylic acid from willow bark experiment - Essay about on the job training experience - The crucible act 2