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

The burning of 80.3 g of sih4

02/12/2021 Client: muhammad11 Deadline: 2 Day

1. If 4.168 kJ of heat is added to a calorimeter containing 75.40 g of water, the temperature of the water and the calorimeter increases from 24.58°C to 35.82°C. Calculate the heat capacity of the calorimeter (in J/°C). The specific heat of water is 4.184 J/g•°C.

a.

622 J/°C

b.

55.34 J/°C

c.

315.5 J/°C

d.

25.31 J/°C

e.

17.36 J/°C

2. How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? DH0 for the reaction is +624.6 kJ.

SiO2(g) + 3C(s) ®SiC(s) + 2CO(g)

a.

366 kJ

b.

1.13 ´ 105 kJ

c.

5.06 kJ

d.

1.33 ´ 104 kJ

e.

31.2 kJ

3. How much heat is released when 75 g of octane is burned completely if the enthalpy of combustion is -5,500 kJ/mol C8H18?

C8H18 + 25/2 O2® 8CO2 + 9H2O

a.

7200 kJ

b.

8360 kJ

c.

4.1 ´ 105 kJ

d.

3600 kJ

e.

5500 kJ

4. The burning of 80.3 g of SiH4 at constant pressure gives off 3790 kJ of heat. Calculate DH for this reaction.

SiH4(g) + 2O2(g) ® SiO2(s) + 2H2O(l)

a.

-1520 kJ/molrxn

b.

- 47.2 kJ/molrxn

c.

- 4340 kJ/molrxn

d.

-2430 kJ/molrxn

e.

+ 4340 kJ/molrxn

5. Which of the following statements is incorrect?

a.

The thermochemical standard state of a substance is its most stable state under one atmosphere pressure and at some specific temperature (298 K if not specified)

b.

A superscript zero, such as DH0, indicates a specified temperature of 0°C.

c.

For a pure substance in the liquid or solid phase, the standard state is the pure liquid or solid.

d.

For a pure gas, the standard state is the gas at a pressure of one atmosphere.

e.

For a substance in solution, the standard state refers to one-molar concentration.

6. For which of the following substances does = 0?

a.

CO2(g)

b.

H2O(g)

c.

Na(s)

d.

Br2(g)

e.

C(diamond)

7. Calculate the amount of heat released in the complete combustion of 8.17 grams of Al to form Al2O3(s) at 25°C and 1 atm. DH for Al2O3(s) = 1676 kJ/mol

4Al(s) + 3O2(g) ® 2Al2O3(s)

a.

254 kJ

b.

203 kJ

c.

127 kJ

d.

237 kJ

e.

101 kJ

8. Which of the following is not a formation reaction?

a.

1/2H2(g) + 1/2 Br2(l) ®HBr(g)

b.

H2(g) + 1/2O2(g) ® H2O(l)

c.

Ca(s) + 1/2O2(g) ®CaO(s)

d.

4Al(s) + 3/2O2(g) ® Al2O3(s)

e.

H2O(l) + SO3(l) ® H2SO4(l)

9. Given the standard heats of formation for the following compounds, calculate DHfor the following reaction.

CH4(g)

+ H2O(g)

®

CH3OH(l)

+ H2(g)

DH(kJ/mol)

-75

-242

-238

0

a.

+79 kJ

b.

-79 kJ

c.

+594 kcal

d.

-594 kcal

e.

- 405 kJ

10. Given the following at 25°C, calculate DHfor HPO3(s) at 25°C.

P4O10(s) + 4HNO3(l) ® 4HPO3(s) + N2O5(s)

DH = -180.6 kJ

DH= -2984 kJ/mol for P4O10(s), -174.1 kJ/mol for HNO3(l), and - 43.1 kJ/mol for N2O5(s).

a.

-528.0 kJ/mol

b.

-1474 kJ/mol

c.

-948.5 kJ/mol

d.

+1474 kJ/mol

e.

-954.5 kJ/mol

11. How much heat is released when 6.38 grams of Ag(s) reacts by the equation shown below at standard state conditions?

4Ag(s) + 2H2S(g) + O2(g) ® 2Ag2S(s) + 2H2O(l)

Substance

Ag(s)

0

H2S(g)

-20.6

O2(g)

0

Ag2S(s)

-32.6

H2O(l)

-285.8

a.

8.80 kJ

b.

69.9 kJ

c.

22.1 kJ

d.

90.8 kJ

e.

40.5 kJ

12. Which of the following techniques cannot be used to calculate DHrxn?

a.

Calorimetry

b.

Using melting points of reactants and products

c.

Hess's Law

d.

Using of Heats of Formation of reactants and products

e.

Using bond energies of reactants and products

13. Evaluate DH0 for the following reaction from the given bond energies.

2HBr(g) ® H2(g) + Br2(g)

DHH-H = 436 kJ/mol, DHBr-Br = 193 kJ/mol, DHH-Br = 366 kJ/mol

a.

-103 kJ

b.

-143 kJ

c.

+103 kJ

d.

+142 kJ

e.

259 kJ

14. A positive change in entropy represents:

a.

an increase in molecular disorder

b.

release of thermal energy

c.

a decrease in thermal energy

d.

a process that is always spontaneous

e.

a process that cannot occur spontaneously

15. The second law of thermodynamics states:

a.

All exothermic processes also increase entropy.

b.

The enthalpy of the universe always increases in spontaneous processes.

c.

A spontaneous process always increases entropy.

d.

DH<0 and DS >0 for all spontaneous processes

e.

The entropy of the universe always increases in spontaneous processes.

16. What is the entropy change of the reaction below at 298 K and 1 atm pressure?

N2(g)

+ 3H2(g)

®

2NH3(g)

S (J/mol·K)

191.5

130.6

192.3

a.

-198.7 J/K

b.

76.32 J/K

c.

-129.7 J/K

d.

303.2 J/K

e.

384.7 J/K

17. The heat of vaporization of methanol, CH3OH, is 35.20 kJ/mol. Its boiling point is 64.6°C. What is the change in entropy for the vaporization of methanol?

a.

-17.0 J/mol•K

b.

3.25 J/mol•K

c.

17.0 J/mol•K

d.

104 J/mol•K

e.

543 J/mol•K

18. Which of the following statements regarding the third law of thermodynamics is incorrect?

a.

The absolute S is zero at 0 Kelvin.

b.

The absolute S at 298 K can be positive or negative.

c.

Pure substances have positive absolute S at T > 0 Kelvin.

d.

Absolute zero gives a reference point for determining absolute S.

e.

The absolute S is greater at 300 K than 100 K for a given substance.

19. Which of following would have the highest value of absolute entropy per mole?

a.

water at 50°C

b.

water at 10°C

c.

ice at -10°C

d.

1 MNaCl at 50°C

e.

1 MNaCl at 10°C

20. Based on the relationship of entropy to the degree of disorder in a system, which response includes all the following changes that represent an increase in entropy, and no others?

I.

the freezing of water

II.

the condensation of steam

III.

sublimation (vaporization) of dry ice, solid CO2

IV.

the extraction of salts and pure water from seawater

a.

I and IV

b.

II and IV

c.

I, and II

d.

III

e.

I and III

21. Which response includes all the following processes that are accompanied by an increase in entropy, and only those processes?

I.

boiling water

II.

freezing water

III.

N2(g) + 3H2(g) ® 2NH3(g)

IV.

Br2(l) ® Br2(g)

a.

I and II

b.

III and IV

c.

I and IV

d.

II, III, and IV

e.

another one or another combination

22. Which of the following changes represent a decrease in entropy?

a.

Precipitation of CaCO3 to form a seashell

b.

Evaporation of gasoline

c.

Decomposition of a dead animal

d.

Melting snow

e.

Diffusion of perfume throughout a room.

23. Consider the conversion of a substance from solid to liquid.

Solid Liquid

At one atmosphere pressure and at the melting point of the substance, __________.

a.

DH = 0 for the process

b.

DS = 0 for the process

c.

DE = 0 for the process

d.

DG = 0 for the process

e.

both DH = 0 and DE = 0 for the process

24. Evaluate DG0 for the reaction below at 25°C.

2C2H2(g)

+ 5O2(g)

®

4CO2(g)

+ 2H2O(l)

DG (kJ/mol)

209.2

0

-394.4

-237.2

a.

-1409 kJ

b.

-2599 kJ

c.

-1643 kJ

d.

-2470 kJ

e.

-766 kJ

51. Calculate DG0 at 298 K for the reaction below.

Fe2O3(s)

+ 13CO(g)

®

2Fe(CO)5(g)

+ 3CO2(g)

DH (kJ/mol)

-824.2

-110.5

-733.8

-393.5

S0 (J/mol•K)

87.4

197.6

445.2

213.6

a.

+63.6 kJ

b.

+26.8 kJ

c.

-243.1 kJ

d.

-52.2 kJ

e.

-193.3 kJ

52. The standard molar enthalpy of formation of NO2(g) is 33.2 kJ/mol at 25°C and that of N2O4(g) is 9.16 kJ/mol. At 25°C their absolute entropies are 240.0 and 304.2 J/mol•K, respectively. Use the above data to calculate the standard Gibbs free energy change for the following reaction at 25°C. Express your answer in the form DG0 = __________ kJ.

N2O4(g) ® 2NO2(g)

a.

4.1 kJ

b.

21.3 kJ

c.

4.8 kJ

d.

41.5 kJ

e.

11.4 kJ

53. For which set of values of DH and DS will a reaction be spontaneous (product-favored) at all temperatures?

a.

DH = +10 kJ, DS = -5 J/K

b.

DH = -10 kJ, DS = -5 J/K

c.

DH = -10 kJ, DS = +5 J/K

d.

DH = +10 kJ, DS = +5 J/K

e.

no such values exist

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:

Solutions Store
Coursework Help Online
Assignment Solver
Supreme Essay Writer
Quality Assignments
Math Exam Success
Writer Writer Name Offer Chat
Solutions Store

ONLINE

Solutions Store

After reading your project details, I feel myself as the best option for you to fulfill this project with 100 percent perfection.

$24 Chat With Writer
Coursework Help Online

ONLINE

Coursework Help Online

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$15 Chat With Writer
Assignment Solver

ONLINE

Assignment Solver

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.

$26 Chat With Writer
Supreme Essay Writer

ONLINE

Supreme Essay Writer

I have read your project description carefully and you will get plagiarism free writing according to your requirements. Thank You

$27 Chat With Writer
Quality Assignments

ONLINE

Quality Assignments

After reading your project details, I feel myself as the best option for you to fulfill this project with 100 percent perfection.

$16 Chat With Writer
Math Exam Success

ONLINE

Math Exam Success

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

$37 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

Gema optiflex 2 nozzles - Societe generale case study answers - How to run independent sample t test in spss - Nr 511 week 4 midterm - The politics of public budgeting 9th edition pdf - Rjr nabisco case solution - Week 2 project - Week 7 Assignment - Fortified breakfast cereals australia - Discussion - Dbt skills training manual - Facts about phillip schofield - History of California-4 - Individual health history and examination assignment resource - Friend or foe worksheets - +91-8306951337 love marriage specialist astrologer IN Meerut - Study guide for essentials of nursing research pdf - 207/101 bay street port melbourne - Immi gov au vevo - Central research institute homeopathy - Aps 5 work level standards - Managerial Accounting Group Case 2 - Hazardous area classification chart download - Dokuz eylul university master's programs - Mother tongue close reader answers - Is a hypothesis an educated guess - Movies with full penetration on netflix 2015 - City of golden ballot question 2e - Cisco business edition 6000 installation guide - 6 regions of south carolina - Mantis tiller throttle adjustment - Ritz carlton target market - The passion of the christ the devil - Bec full form cambridge - Cobra cb radio modifications - I hate running case study answers - Manitou m30 4 manual - Gender roles in the kite runner - Writing workshop critical response essay - 350 words - Operations management assignment 1 - WK 5 Assignment - Husky injection molding buffalo ny - Blaux mini air conditioner - DS wh-14 - Who are you lesson - Which synonym describes the greatest degree of regret - Mixing lead nitrate and potassium iodide - CCIS- Art- Final Paper (3times) - Northeastern film major - Download the file below - Robert b ray the thematic paradigm - 5 axioms of communication gamble and gamble - Back to back stem and leaf graph - Fresh uni of bath - Fort street girls high school - 10 fold dilution calculator - Which best summarizes ida tarbell's assessment of standard oil - A thousand splendid suns prezi - Rookwood v for vendetta - Asci 202 introduction to aeronautical science - Air flows through the tube shown in the figure - Newer marital problems stuff of purity - Quadratic expressions and algebraic fractions - Reward of three kelly jamieson read online - Good pet bad pet by elizabeth schleichert - CASE STUDY: PROJECT MODEL PART 1 - Comparative vertebrate anatomy exam questions - Work breakdown structure for coffee shop - Advances in backstage technology usually affect marketing activities by - Why do firms use cross border strategic alliances - Cal - 32 pitonga way greenwood - CC Week15 DB - Chemical equation maker for word - Shadow health neurological assessment subjective data - Adelaide aqua desalination plant - Greater Good Analysis- APA FORMAT!! 3-4 PAGES... - What is Psychology? - Titration of iron ii with potassium manganate - Cipd 3rai - Kpi planning template - The Assignment Topic: Select an organisation that has gone through a Merger or Acquisition within the past 5 years. Assess its position before and after the merger/acquisition, along with how the strategic alliance has assisted in the achievement of the financial objectives of the organization. - Reply to Biostatistics Discussion- Confounders - Introduction to virtualization ppt - SKILL DEVELOPMENT PLAN - Create a flyer in word assignment - Transitions previews and summaries are all examples of - Structural steel span tables answers - NURS340REPLY - Vertical analysis of balance sheet and income statement - Discussions 3 - Richard fitzsimmons merrill lynch - Full block style application letter - Jennifer eichinger cpa parsons ks - Sabine state bank oakdale la - Five elements of management - Honeywell enraf 854 manual - How to write application for railway pass - Week 6 lab summit ridge mountain resort student