For which of the following processes is the equation AS = qrev /T valid? 4. any reversible expansion of an ideal gas. isothermal irreversible compression of a non-ideal gas. constant pressure heating of a liquid. isothermal vaporization of a liquid. isothermal sublimation of a solid to a non-ideal vapor. 1. 2. 3. 4. 5. 1 & 3 only B) 1, 4 & 5 only E) 4 & 5 only C) 2, 3 & 4 only A) D) 2, 4 & 5 only

For which of the following processes is the equation AS = qrev /T valid? 4. any reversible expansion of an ideal gas. isothermal irreversible compression of a non-ideal gas. constant pressure heating of a liquid. isothermal vaporization of a liquid. isothermal sublimation of a solid to a non-ideal vapor. 1. 2. 3. 4. 5. 1 & 3 only B) 1, 4 & 5 only E) 4 & 5 only C) 2, 3 & 4 only A) D) 2, 4 & 5 only

Chemistry

10th Edition

ISBN:9781305957404

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

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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When gasoline burns in an automobile engine, the heat released (312 J) causes the products CO2 and H2O to expand, which pushes the pistons outward. Excess heat is removed by the car’s cooling system. If the work associated with the expanding gases is equal to 441 J, how much is the change in internal energy of the piston? If answer is negative, include sign, e. g. -1000. No need to add positive sign if answer is positive, e.g. 1000.
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27 of 42 (> Constants | Periodic Table A calorimeter is an insulated device in which a chemical reaction is contained. By measuring the temperature change, AT, we can calculate the heat released or absorbed during the reaction using the following equation: Consider the reaction C12 H22O11 (s) + 1202(g)-12CO2(g) + 11H2O(1) in which 10.0 g of sucrose, C12 H22011, was bumed in a bomb calorimeter with a heat capacity of 7.50 kJ/C. The temperature increase inside the calorimeter was found to be 22.0°C. Calculate the change in internal energy, AE, for this reaction per mole of sucrose. q= specific heat x mass x AT Or, if the calorimeter has a predetermined heat capacity, C, the equation becomes Express the change in internal energy in kilojoules per mole to three significant figures. 9=C x AT • View Available Hint(s) At constant pressure, the enthalpy change for the reaction, AH, is equal to the heat, gp, that is, V ΑΣφ ? AH= q, AE = kJ/mol but it is usualy expressed per mole of reactant and…
2. An ideal gas in thermal contact with the surroundings is cooled in an irreversible process at constant pressure. Are 4Ssystem, ASsurroundings and 4Stotal positive, negative or zero? (a) negative, negative, negative (b) negative, positive, negative (c) negative, positive, positive (d) positive, positive, positive
Given the following line of best fit, determine the values for enthalpy and entropy for this reaction. y = -14406x + 45.076 ΔΗ 1 R T Remember: InK sp AS R Part A - Solve for AH. Report your answer in kJ/mol. ? Submit Request Answer Part B - Solve for AS. Report your answer in J/ mol K | ? Submit Request Answer
The figure below shows a gas going through a cyclic process A - B-C+ A. During the process B - C, the heat is transferred out of the system and during the process C- A, the internal energy decreases. P (kPa) 8. B 4. 2 C V (m) 10 8 (a) Determine the sign associated with Q, W, and AEt for the process B - C. Won the gae) Q AEnt B+C (b) Determine the sign associated with Q, W, and AEt for the process C - A. W. "(on the gan) ΔΕ C-A (c) Determine the sign associated with Q, W, and AEnt for the process A - B. Won the gas) Q AEint A -B
A ballon of helium gas lost 36.4kJ of heat while it was raising up, simultaneously, the helium gas expanded from 64.0 L to 80.0 L against 563 mmHg pressure. Calculate the change in internal energy of helium gas in kJ Select one: а. -33.6 b. -37.6 C. -39.6 d. -35.6 e. -31.6
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mass of cold water 50g temp of cold water 21 C mass of hot water 50g temp of hot water 56 C temp of mixed water 38.7 C *4.18 J/gC specific heat capacity 1. Calculate heat lost by the hot water in the calorimeter (q hot water). 2. Calculate heat gained by cold water (qcold water). 3. Results from 1 and 2, calculate heat gained by calorimeter (q calorimeter). 4. Calculate calorimeter constant (C calorimeter).
15 g of dimethylhydrazine and 15 g of nitrogen tetraoxide react at 30.2°C and at constant volume, releasing 159.2 kJ: a) Calculate, with this heat, what mass of ice, being initially at -23°C it can be heated up to 97.5°C b) Determine H of the reaction c) Determine the enthalpy of formation of liquid dinitrogen tetraoxide DATA: M- (g-mol ): AH + 718,84 = C(g) 213,34=CO,(g) = N(g) S740 = Cigrafito) s Hig) 205,u3 = 0,(e) Datos: H>O=18,02 (CHsJNNH=60,08 N:Oe=92,0 A,H"(H,e) = -285,83 kl-mol AH(H,0) - 6,025 kl-mol Dlealaces) (N-Hje 391 (C-N). 293 AH(CH))NNH, -61,92 kl-mol (C-H)- 413 AG (CO g)-394,36 (N-N) = 163 H,0.J) =75, 241 J. mal n GAT +472,10 + 217,97 SIH,O,R) 33, S8 ANSWER: a) 202,1 g b) -1940 kJ/mol c) -21.9 kJ/mol