Thermite demo CER 2022 Prachi Patel
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CHM 11100
Activities and Explorations
Claim, Evidence, Reasoning
Thermite Demonstration due November 20 at 11:59 PM, worth 10 points
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Watch the Thermite reaction demonstration and answer the following questions.
1.
(1 pts) Casey claimed that the thermite reaction was an exothermic reaction, identify at
least 2 pieces of evidence from the video that support her claim (the reaction is
exothermic).
The reaction is exothermic because there was a lot of heat
and spark given off. The heat was going from the system to
the surroundings. The system lost energy through sparks.
2.
This is a rendering of the thermite reaction. Include
labels and a description for the following:
(1 pt) The system (Hint:
What is in the crucible, the
cup in the ring stand?),
The system is the Iron oxide, Aluminum, and
Potassium permanganate with the glycerin
(1 pt.) the surroundings, and
The surrounding is everything else including the crucible, the sand, the air in the
atmosphere, and the ring stand.
(1 pt.) draw an arrow or arrows to describe the flow of energy between system and
surroundings (which way does it flow, system to surroundings, or surroundings to
system?).
3.
(3 pts.) Write a balanced chemical equation for the thermite reaction showing all states
of reactants and products.
Assign oxidation numbers to all elements in the reactants
and products.
Fe
2
O
3
(s) + 2Al(s)
à
2 Fe(l) + Al
2
O
3
(s)
Fe=+3 so Fe
2
=+6 O=-2 so O
3
=-6 Al=0 Fe=0 Al=+3 so Al
2
=+6 O=-2 so O
3
=-6
4.
Write out reasoning for the following claim:
The thermite reaction is exothermic. (We are
giving you the claim!)
Reasoning: (3 pts) Assemble an argument by connecting your observations and evidence to the
claim to justify why the reaction is exothermic.
Explain your reasoning and use scientific
principles about heat flow that we have explored in class.
You must discuss the energy flows in
the reaction and what evidence you have for that energy exchange (you can use your picture
drawn in #2!).
The thermite is an exothermic reaction. It is an exothermic reaction because the light that was
given off during the reaction indicated that the heat was being released. If the heat is being
released it is going from the system to the surrounding. That’s the arrows are on two are going
to the surroundings from the system. In exothermic heat is given off and it goes from the system
to the surroundings; that is why this reaction is exothermic.
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Methane, the principal component of natural gas, is used for heating and cooking. The combustion
process is
CH (g) + 2 O2(g) → CO2(g) + 2 H,0(!)
If 11.3 moles of CH4 react with oxygen, what is the volume of CO, (in liters) produced at 22.1°C and
0.915 atm?
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The K. for the following reaction is 15 at 220 °C. If an equilibrium mixture contains 0.40 M CO
and 0.20 M H2, what is the molar concentration of CH4O ?
CO (g) + 2H2 (g) CH,0(g)
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a) Briefly describe two fundamental differences between the two theories. You could consider differences in
the models, the mathematics, or the results. "Brief description" means two to three sentences per
difference.
b) Briefly describe an advantage that valence bond theory has over molecular orbital theory.
c) Briefly describe an advantage that molecular orbital theory has over valence bond theory.
6) Use a Jablonski diagram or potential energy curves to show the theoretical difference between fluorescence and
phosphorescence. Describe how you determine the difference experimentally.
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a) Briefly describe two fundamental differences between the two theories. You could consider differences in
the models, the mathematics, or the results. "Brief description" means two to three sentences per
difference.
b) Briefly describe an advantage that valence bond theory has over molecular orbital theory.
c) Briefly describe an advantage that molecular orbital theory has over valence bond theory.
6) Use a Jablonski diagram or potential energy curves to show the theoretical difference between fluorescence and
phosphorescence. Describe how you determine the difference experimentally.
7)…
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If 24.0 g of NaOH is added to 0.650 L of 1.00 M
Cu(NO:)2, how many grams of Cu(OH)2 will be
formed in the following precipitation reaction?
2 NaOH(aq) + Cu(NO:)>(aq) → Cu(OH)2 (s) + 2
NaNO:(aq)
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Scenario 2
The airbags in vehicles contain a mixture of NaN,, KNO, and SiO, When a car decelerates at a rapid
pace, an electrical signal goes to the gas generator inside the airbag, triggering a series of three
chemical reactions:
10NAN.
10NA +2KNỎ,
K,O + Na,0 + Na + SiO, - K,SiO,
10NA + 15N,(g)
KO + 5Na O + N,(g)
These reactions produce gas (N.) to fill the airbag and convert sodium azide (NaN,), a highly toxic
substance, to alkaline silicate (K,SiO ).
The quantity of NaN, must be carefully calculated to ensure that the volume of gas is adequate to fill
the airbag firmly enough to protect the passenger but not overfill and cause the bag to explode. A
standard airbag needs 67 L of N, (g) to properly inflate.
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[References]
Use the References to access important values if needed for this question.
Taking logarithms and antilogarithms is necessary to solve many chemistry problems. For practice, complete the following table, where N is a number.
log N
7.92
1.867
-1.402
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If 9 moles of chlorine react,
The reaction consumes
The reaction produces
Use the References to access important values if needed for this question.
When chlorine reacts with water, hydrochloric acid and chloric acid (HCIO3) are produced. The balanced equation
for this reaction is:
3Cl₂(g) + 3H₂O(1)→ 5HCl(aq) + HClO3(aq)
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Topic: Differential Equations (Engineering)1. Follow the rule correctly. 2. Solve the asked problem in a step-by-step procedure3. Kindly encircle the final answer. 4. Double-check your solutions because we need them for our review.
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A gas initially at 5.32 L, 1.69 atm, and 61 °C undergoes a change so that its final volume and
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unchanged.
of moles remains
atm
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Determine AH
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2NOC1(g)
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(a) Both A and R are correct and R is the correct explanation of A.(b) Both A and R are correct but R is not the correct explanation of A.(c) Both A and R are not correct.(d) A is not correct but R is correct.
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14. Which absorbs heat faster? Land or wvater? Why?
Answer
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Scenario 3
At dinnertime, the soldiers we re miles from a fie ld kitchen. They each pulled out a
meal pouch, inserted it into a small bag, and added water. Within 15 minutes, the
soldiers were eating hot meals, which are the U.S. Army's "Meal, Ready-to-Eat," or MRE, Tatio
Each MRE is a main dish within a pouch made of aluminum foil and plastic. In 1985, researchers
at the Army's Natick Research, Development, and Engineering Center invented a way to heat
MRES using a special "Flameless Ration Heater," or FRH.
Each FRH is a plastic sleeve that holds a pad containing metal particles embedded in a polymeric
matrix. The metal is an alloy of 90% magnesium and 10% iron. The entire package has a mass of
20.0 g, of which about 8.1 g is magnesium. In the FRH, the water reacts with magnesium in an
exothermic reaction
The energy released by this reaction warms the meal to 60°C. To speed the reaction, iron was
added to the FRH. Both iron and magnesium react readily with warm water but since iron is…
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help explain why two atoms are attracted to each
other and how the changes in these atoms provides
the mechanism (the process by which it occurs).
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Please use these observations
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Propose a plausible mechanism for the following transformation.
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Select one:
a. Ozone producers
b. Ozone depleting substances
C. Chlorine reservoirs.
d. 02 reservoirs
Which one of the following is not a renewable resource?
a. Coal
b. Solar energy
c. Carbon dioxide
d. Chitin
Which one of the following resources is not renewable:
a. Solar energy
b. Fossil fuel
C. Chitin
d. Ocean waves energy
Which of the following is not one of soap kinds?
4
a. Floating soap
b. Flipping soap
c. Medicated soap
d. Transparent soap
Which statement is wrong concerning sewage
eutrophication of water:
Select one:
a. It causes Enrichment
b. Lower water quality
c. It decreases DO
d. It causes Smog
HCFCS are considered as:
Select one:
a. The most ozone-destructive chemicals.
b. Less ozone-destructive chemicals than
CFCS
C. More ozone-destructive chemicals than
CFCS.
d. The least ozone-destructive chemicals.
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- Do question 2 pleas, don’t return the question pleasearrow_forwardEdit Bookmarks People Tab Window Help View History O Question 17 - Chapter 5 - Conr x Adams, Amaya K - Outlo X O Chapter 5 - CHEM-1110-941 - x o.mheducation.com/ext/map/index.html?_con3con&external_browser%3D0&launchUrl=https%253A%252F%252Flms.mhed Saved 1 attempts left Check my work Enter your answer in the provided box. Methane, the principal component of natural gas, is used for heating and cooking. The combustion process is CH (g) + 2 O2(g) → CO2(g) + 2 H,0(!) If 11.3 moles of CH4 react with oxygen, what is the volume of CO, (in liters) produced at 22.1°C and 0.915 atm? 116 MAR F664 17 18 étv Aarrow_forwardAutoSave Off Chapter 10 homework Word O Search Julianna Wren JW File Home Insert Draw Design Layout References Mailings Review View Help 8 Share 、A A Aav A 三、三、、三三刻 O Find Calibri (Body) v11 AaBbCcDc AaBbCcDc AaPhC AaBbCcC AaB S Replace Paste BIU ab x, x A ov A - 三=== =、、田 1 Normal 1 No Spac.. Heauing 1 Sensitivity Heading 2 Title Dictate A Select v Clipboard Font Paragraph Styles Editing Voice Sensitivity The K. for the following reaction is 15 at 220 °C. If an equilibrium mixture contains 0.40 M CO and 0.20 M H2, what is the molar concentration of CH4O ? CO (g) + 2H2 (g) CH,0(g) D. Focus age 2 of 4 395 words 以 2:3 72% 11/1 e Type here to search Prise Insert 1> 1>arrow_forward
- Pls help ASAP. Pls show all work. If its false then pls make sure to write the correct statement and why it is false.arrow_forwardAutoSave O Off Practice problems exam 3 - Protected View - Saved to this PC - P Search (Alt+Q) Yuleymi Gondola File Home Insert Draw Design Layout References Mailings Review View Help P Comments v A Share i) PROTECTED VIEW This file has been verified by Microsoft Defender Advanced Threat Protection and it hasn't detected any threats. If you need to edit this file, click enable editing. Enable Editing a) Briefly describe two fundamental differences between the two theories. You could consider differences in the models, the mathematics, or the results. "Brief description" means two to three sentences per difference. b) Briefly describe an advantage that valence bond theory has over molecular orbital theory. c) Briefly describe an advantage that molecular orbital theory has over valence bond theory. 6) Use a Jablonski diagram or potential energy curves to show the theoretical difference between fluorescence and phosphorescence. Describe how you determine the difference experimentally. 7)…arrow_forwardAutoSave O Off Practice problems exam 3 - Protected View - Saved to this PC - P Search (Alt+Q) Yuleymi Gondola File Home Insert Draw Design Layout References Mailings Review View Help P Comments v A Share i) PROTECTED VIEW This file has been verified by Microsoft Defender Advanced Threat Protection and it hasn't detected any threats. If you need to edit this file, click enable editing. Enable Editing a) Briefly describe two fundamental differences between the two theories. You could consider differences in the models, the mathematics, or the results. "Brief description" means two to three sentences per difference. b) Briefly describe an advantage that valence bond theory has over molecular orbital theory. c) Briefly describe an advantage that molecular orbital theory has over valence bond theory. 6) Use a Jablonski diagram or potential energy curves to show the theoretical difference between fluorescence and phosphorescence. Describe how you determine the difference experimentally. 7)…arrow_forward
- wade upetement Atomic, Aboncwass, Group 173 Specific heat 19.42 Zazım. 317.28 13arrow_forwardakhenaten and nefertiti - Google X O Homework and quiz in CHEM101 X O Dashboard My Questions | bartleby A learn.maricopa.edu/courses/1132256/modules/items/19018031 CHM151 17003 > Modules > Weeks 8 & 9 - Chapter 7 > Homework and quiz in CHEM101 - due Sunday night CG 2020 FALL CRED Question 24 of 30 Submit Account Home Announcements If 24.0 g of NaOH is added to 0.650 L of 1.00 M Cu(NO:)2, how many grams of Cu(OH)2 will be formed in the following precipitation reaction? 2 NaOH(aq) + Cu(NO:)>(aq) → Cu(OH)2 (s) + 2 NaNO:(aq) g Dashboa |Modules rd Concourse Syllabus Courses Grades 1 2 3 Cisco Webex Groups Tutoring/Learning Center 4 6. C Calendar 7 8 9. Inbox + History +/- X Help • Previous Next » Library 2:42 PM O Type here to search 10/25/2020 COarrow_forward..1.. 4.. . I6 Il 7 Scenario 2 The airbags in vehicles contain a mixture of NaN,, KNO, and SiO, When a car decelerates at a rapid pace, an electrical signal goes to the gas generator inside the airbag, triggering a series of three chemical reactions: 10NAN. 10NA +2KNỎ, K,O + Na,0 + Na + SiO, - K,SiO, 10NA + 15N,(g) KO + 5Na O + N,(g) These reactions produce gas (N.) to fill the airbag and convert sodium azide (NaN,), a highly toxic substance, to alkaline silicate (K,SiO ). The quantity of NaN, must be carefully calculated to ensure that the volume of gas is adequate to fill the airbag firmly enough to protect the passenger but not overfill and cause the bag to explode. A standard airbag needs 67 L of N, (g) to properly inflate. notesarrow_forward
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