test 3 recitation

.pdf

School

University Of Georgia *

*We aren’t endorsed by this school

Course

1211L

Subject

Chemistry

Date

Feb 20, 2024

Type

pdf

Pages

Uploaded by ChiefIceMeerkat32

Recitation Worksheet Ten: Exam III Review Name: UGA ID: Instructions: § This recitation worksheet is a review for Exam III. § You do not need to submit it to Gradescope. § The answer key has been posted with this worksheet to eLC. § The recitation session during the exam week (October 30-November 2) is still mandatory . Your attendance will be recorded. § A periodic table and formula sheet are attached to the end of this worksheet. 1. An undergraduate student goes to chemistry lab to perform the bomb calorimetry experiment using benzoic acid (q comb = - 3225 kJ/mol; molar mass = 122.12 g/mol). They see a temperature change of approximately 4.10 ºC. If the heat capacity of the calorimeter is 12.1 kJ/ºC, what was the starting mass of benzoic acid used (in g)? g

2. A 6.16 g sample of benzene (C 6 H 6 ), an organic compound with a q comb = -41.74 kJ per gram of benzene, is combusted in a bomb calorimeter. What will the change in temperature of the bomb calorimeter be (in ºC) if the heat capacity of the calorimeter is 50.4 kJ/K? ºC 3. A bomb calorimetry experiment is performed with xylose, C 5 H 10 O 5 , as the combustible substance. The data obtained are: Mass of xylose burned: 1.183 g Heat capacity of calorimeter: 4.728 kJ/ºC Initial calorimeter temperature: 23.29 ºC Final calorimeter temperature: 27.19 ºC Based on this information, what is the heat of combustion of xylose in kJ/mol? kJ/mol

4. Given the information below, what is ∆H rxn for: C 3 H 4 (g) + 2 H 2 (g) → C 3 H 8 (g) H 2 (g) + ½ O 2 (g) → H 2 O (l) ∆H rxn = -285.8 kJ/mol C 3 H 4 (g) + 4 O 2 (g) → 3 CO 2 (g) + 2 H 2 O (l) ∆H rxn = -1937 kJ/mol C 3 H 8 (g) + 5 O 2 (g) → 3 CO 2 (g) + 4 H 2 O (l) ∆H rxn = -2219.1 kJ/mol kJ/mol 5. Given the information below, what is ∆H rxn for: CH 4 (g) + NH 3 (g) → HCN (g) + 3 H 2 (g)? N 2 (g) + 3 H 2 (g) → 2 NH 3 (g) ∆H rxn = -91.8 kJ/mol C (s) + 2 H 2 (g) → CH 4 (g) ∆H rxn = -74.9 kJ/mol H 2 (g) + 2 C (s) + N 2 (g) → 2 HCN (g) ∆H rxn = 270.3 kJ/mol kJ/mol

6. Given the following hypothetical reactions below... what is ∆H rxn for the reaction A (g) + 3 B (g) → D (g) + C (g)? kJ/mol

7. Of the following, ΔH° f is not zero for ________. 8. Consider the balanced reactions provided below. Which of the following are standard formation reactions? Select any that apply. 9. Calculate Δ r H° for the reaction below using standard enthalpies of formation provided in the table below. 4 NH 3 (g) + 5 O 2 (g) → 6 H 2 O (g) + 4 NO (g) Substance ΔH° f (kJ/mol) NH 3 (g) -45.9 NO (g) +91.3 H 2 O (g) -241.8 kJ A. O 2 (g) B. C (graphite) C. N 2 (g) D. F 2 (s) E. Cl 2 (g) A. C (s) + 2 H 2 (g) → CH 4 (g) B. 2 C (s) + 4 H 2 (g) → 2 CH 4 (g) C. 2 CO (g) + O 2 (g) → 2 CO 2 (s) D. CO (g) + ½ O 2 (l) → CO 2 (g) E. H 2 (g) + ½ O 2 (g) → H 2 O (g) F. H 2 (g) + ½ O 2 (g) → H 2 O (l) G. H 2 (g) + ½ O 2 (l) → H 2 O (l) H. 2 H 2 (g) + O 2 (g) → 2 H 2 O (l) I. CaO (s) + CO 2 (g) → CaCO 3 (s)

10. Calculate Δ r H° for the reaction below using standard enthalpies of formation provided in the table below. Fe 2 O 3 (s) + 3 CO (g) → 2 Fe (s) + 3 CO 2 (g) Substance ΔH° f (kJ/mol) Fe 2 O 3 (s) -824.2 CO (g) -110.5 CO 2 (g) -393.5 kJ 11. The value of ΔH° for the reaction below is -3351 kJ. The value of ΔH° f for Al 2 O 3 (s) is ________ kJ. 2 Al (s) + 3 O 2 (g) → 2 Al 2 O 3 (s) kJ

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Related Questions

lithium hydrogen sulfite Express your answer as a chemical formula. ΑΣφ A chemical reaction does not occur for this question. Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B sodium permanganate Express your answer as a chemical formula. ?

Please don't provide handwritten solution ....

59 Experiment 7 Chemical Properties of Compounds: Chemical Reactions Date: Name: Experiment 7 Chemical Properties of Compounds: Chemical Reactions Questions and Problems (May be assigned before or after the experiment, depending on your instructor.) (Show all calculations where appropriate.) toom temperature white solid is mixed with a room temperature clear liquid resulting in a clear, colorless quid that is hot to the touch. Has a chemical reaction occurred? Why or why not? (It may be possible to argue in favor of yes OR no. Defend YOUR answer. Introduction 2. A clear, colorless liquid is mixed with a clear, blue liquid resulting in a white powder suspended in a clear, colorless liquid. Has a chemical reaction occurred? Why or why not?

Click the link to access the "Elements and Polarity" simulation by Concord Consortium. Generate an electron "surface view for the molecules below. You are able to rotate and resize the molecules in the simulation. Based on your findings, which molecule is most similar to hexane in terms of its polarity? O stearic acid O mineral oil O phospholipid ammonia

can someone help me with this? questions 1-5 I need it before midnight... please help me. thank you so much

FORMULATION OF NON-METAL - NON-METAL BINARY COMPOUNDS Complete the following table! Compiler Elements Chemical Formulas amount The first element The second element amount Nitrogen 2 4 Охудen Охудen ......... Sulfur 1 3 ........ IF3 ........ ..... ......... P205 ......... .... .. ........ .........

It’s not a graded question!! Answer should be in excel, but you can write on paper, I just want to understand this question

What is the importance of studying General Chemistry in life?

(please type answer)

. C. 5. .. 6. . S. .. .. _H3PO4 + КОН → K+ _B₂O3 → HCI + NaOH → C + S8→ Na + _O₂ → NaOH + _C6H6 + _N₂ +. KOH + HBr → _AI(OH)3 + Rb + Li + _C10H22 + _AI(OH)3 + NHẠCH+ Rb + — RbNO3 → _O₂ → _H₂ → _H₂CO3 → _NH3 + _FeS₂ + CH4 + _CA3(PO4)2 + _O₂ → _H₂O → BALANCING EQUATIONS WORKSHEET CS₂ KBr + _H₂O _H₂CO3 → _Al2(CO3)3 + S8 → O₂ → K₂O + B O₂ → HBr → O₂ → Na₂O _H3PO4 → NH3 _K3PO4 + _H₂O NaCl + _H₂O _CO₂ + _Na₂CO3 + _H₂O RbO₂ + _N₂ CO₂ + SIO₂ + Rb₂S _N₂ + LIOH + _H₂O AlBr3 + _H₂O _H₂O (NH4)3PO4 + _H₂O H₂ _H₂O _Fe₂O3 + _CO₂ + _H₂O C → SO₂ _H₂O CaSiO3 + CO + P

OWLV2 | Assign x * MindTap - Cen X MindTap - Cen X G amu of ca - Go X b My Questions /ui/evo/index.html?elSBN=9781337790840&id3D299783426&snapshotld%=785765& + x GAGE MINDTAP 8: Chemical Composition Ę AA e. strontium chloride Answer + 31. Calculate the number of moles of the indicated substance present in each of the following samples. a. 21.4 mg of nitrogen dioxide b. 1.56 g of copper(II) nitrate c. 2.47 g of carbon disulfide d. 5.04 g of aluminum sulfate e. 2.99 g of lead(II) chloride f. 62.4 g of calcium carbonate 32. Calculate the number of moles of the indicated substance present in each of the following samples. a. 47.2 g of aluminum oxide 53 F insert pua F12 prt sc home F10 F11 F7 F4 F5

A theoretical plate is: the theoretical glassware it takes to distill a specific mixture. an evaporation/condensation cycle. a chromatographic technique used to analyze your distillate. a hot plate used to heat the distillation apparatus.

Why is classifying compounds important?

What problems of society can analytical chemists help in finding solutions? How do they do it? Discuss the quartering method of sampling.

Based on this. What mass of water was driven off by heating? (Grams)

Potassium iodide + chlorine = ANSWER IN WORDS ONLY!!!

mHMAC3ccdb6aa11676716c83835709749d96e5#10001 Translate Reading list 1 of 11 I Review | Constants Periodic Table Part A Julia spent $50 on a book. The cost of the book was $18 less than twice what she spent on a backpack. How much did the backpack cost? Express your answer numerically in dollars. • View Available Hint(s) Hint 1. Identify the mathematical equation Hint 2. Identify the expression for the cost of the backpack

Please help me with these questions ASAP. I really need this now. Thank you very much

SEE MORE QUESTIONS

Recommended textbooks for you

Introductory Chemistry For Today

Chemistry

ISBN:9781285644561

Author:Seager

Publisher:Cengage

World of Chemistry, 3rd edition

Chemistry

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Brooks / Cole / Cengage Learning

General Chemistry - Standalone book (MindTap Cour...

Chemistry

ISBN:9781305580343

Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Publisher:Cengage Learning