Answered: R=0.0526 kPa * km^-1 convert R to kJ *…

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R=0.0526 kPa * km^-1 convert R to kJ * m^-4

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter16: Spontaneity Of Reaction

Section: Chapter Questions

Problem 85QAP: Which of the following quantities can be taken to be independent of temperature? independent of...

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For the reaction BaCO3(s) BaO(s) + CO2(g), rG = +219.7 kJ/mol-rxn. Using this value and other data available in Appendix L, calculate the value of fG for BaCO3(s).
For a certain system, q = –850 J and the volume changes from 16.37 L to 370. cm3 at a constant external pressure of 1336 torr. (760 torr = 760 mmHg = 1.01325 × 105 Pa = 1 atm)(i) Explain in thermodynamic terminology what is happening in this system.(ii) Calculate the internal energy change for this system.
Construct enthalpy cycles; use Hess's law and the following data to calculate the enthalpy of formation of ethane (from carbon and hydrogen gas). Cis) + Ozig) + CO2(g) AHa = -394kJmol H2g) + %02(a) – H20 m AH°. = -286kJmol1 + 3%O2(g) → 2002(9) + 3H20 m AH = -1560kJmol1
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4.38 g of a gas (28.1 g mol–1) was dissolved in liquid water in a calorimeter with a calorimeter constant of 76.0 J K–1. Prior to mixing everything was equilibrated to 21.2 °C. The resulting solution with a mass of 23.4 g was observed to be at a temperature of -6.8 °C and have a specific heat capacity of 4.61 J g–1 K–1. Determine q per mole for this dissolution process. a. -5150 J/mol b. -1.94 × 104 J/mol c. 2.89 × 105 J/mol d. -3.39 × 105 J/mol e. 3.30 × 104 J/mol
(b) What is Hess law? Several reactions and their standard reaction enthalpies at 298.15 K are given here: AHR (kJ mol-') CaC2(s) + 2 H2O(1) → Ca(OH)»(s) +C;H>(g) -127.9 Ca(s) + 1/2 O2(g) CaO(s) -635.1 CaO(s) + H2O(1) → Ca(OH)2(s) -65.2 The standard enthalpies of combustion of graphite and C2H2(g) are -393.51 and -1299.58 kJ mol-1, respec- tively. Calculate the standard enthalpy of formation of CaC2(s) at 25°C.
Parameters to use for the problems that follow: K = 1.38 × 10-23 J/K q= 1.6 × 10-¹9 coulombs For Silicon at room temperature(T = 300°K): EG = 1.12eV N₁ = = 1 × 10¹0 cm-3 ESi = Ksito (11.8) (8.85 × 10-¹4)F/cm = Hp = 384.62cm²/V - sec, Dp = 10cm²/sec Dn = 32cm²/sec 1230.77cm²/V – sec, flin = Tn = 2.0 × 10-¹sec, Tp = 9.0 x 10-5 sec En = 8.0 × 10-2cm, Ep = 3.0 × 10-²cm 1) A sample of silicon at room temperature and in thermal equilibrium is doped with donor atoms such that ND = 4 x 10¹5 cm-³. Determine the concentration of electrons and holes. ND
The quantity of 83.0 g of potassium iodide (KI) is added to water to give a solution with a mass of 150. g. Assume that this solution is very dilute and thus has the same heat capacity as water. The dissolution reaction and the associated heat for potassium iodide is KI (s) -→ K+(aq) + I-(aq) qrx = DHrx = +20.3 kJ. Calculate the change in the temperature of the solution.
3. Suppose you have a bomb calorimeter and first calibrate it using a known quantity of electrical heat (q=current*voltage*time), thus providing known values for q and AT. Next (using the same device), you measured the combustion of 1 mole of methane, CH4(g) + 2 O2(g) > Co2{g) + 2 H20(1), resulting in a known value of AT, and assuming a perfect gas. Explain with equations and words (be specific), how you would obtain the molar enthalpy of combustion (AcHm ) from this data. Охудen input Firing leads Thermometer Bomb Sample Охудen under pressure Water
3. For an ideal gas, why must the maximum magnitude of work done by/on a gas, |Wmax, be Wmax=-|-nRT/n(Vf/Vi)| ? You may argue using graphs, equations, and/or words.
In a calorimetry experiment 3.2 g of potassium hydroxide is dissolved in 400 mL water in a thermos flask. The temperature increase in the solution is 7 \deg C. The effective mass of the glass in the thermos flask ( mcal) is 0.040 kg. The heat capacity of the solution (Cs) is 4.04 kJkg-1K-1. The heat capacity of the calorimeter (Ccal) is 0.387 kJkg-1K-1. Remember to enter your answer using the specified number of significant figures, but keep the entire number in your calculator for use in further calculations. Part B - Calculating qsolution Calculate the heat absorbed by the solution (qsolution) Give your answer to four significant figures. Part C- Calculating qcalorimeter Calculate the heat absorbed by the glass in the calorimeter (qcalorimeter). Give your answer to four significant figures. Part D - Calculating qtotal Calculate the total heat transferred for the reaction (qtotal) Give your answer to four significant figures. Calculate the number of moles of KOH used in the experiment…
Use the following data to determine the AH° for the conversion of diamond into graphite: C(s,diamond) +O2(g) CO,(g) AH°= -395.4 kJ 200,(g) 2c0(g) +0,(g) AH°= 566.0 kJ 2c0(g) C(s,graphite) + CO,(g) AH°= -172.5 kJ C(s,diamond) AH° = → C(s,graphite) kJ