Questions for Video 1:Introduction to entropy..a systemordered"Move pessible StatesdisorderedMoreEntopyEntropymessy 7 entropyKhan Academy1. Which room has a higher Entropy : clean room or messy room?2. Which of these has a higher Entropy: sun or moon?3. State the second Law of Thermodynamics.

Entropy is degree of randomness or disorderness. More is the disordered is the system, more is the…

a system "ordered "disordored Move possible States More Entopy Entropy Khan Academy 1. Which room has a higher Entropy : clean room or messy room? 2. Which of these has a higher Entropy: sun or moon? 3. State the second Law of Thermodynamics.

a system "ordered "disordored Move possible States More Entopy Entropy Khan Academy 1. Which room has a higher Entropy : clean room or messy room? 2. Which of these has a higher Entropy: sun or moon? 3. State the second Law of Thermodynamics.

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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Which substance has the higher entropy? a. a sample of pure silicon (to be used in a computer chip) or a piece of silicon containing a trace of another element such as boron or phosphorus a piece of silicon containing a trace of another element such as boron or phosphorus a sample of pure silicon b. CO2(g) at 0 °C or CO2 (g) at -50 °C O CO2 (g) at –50 °C O CO2 (g) at 0 °C c. I2 (s) or I2 (g) both at room temperature OL (g) OL (s) d. one mole of CO2(g) at 1 bar pressure or one mole of CO2(g) at 0.01 bar pressure (both at 298 K) one mole of CO2(g) at 0.01 bar pressure one mole of CO2(g) at 1 bar pressure
Which of the following statements is TRUE regarding entropy? a. The entropy of the universe decreases after the occurrence of a spontaneous change. b. The entropy of any substance at temperatures above absolute zero is positive. c. The entropy is zero for a pure, perfect crystal at 0 °C. d.It is possible to determine the standard molar entropy of substances due to the second law of thermodynamics.
elect the ???? description about the second law of thermodynamics. * A. Measure of the randomness or disorder of the system B. Study of energy change of chemical or physical processes C. Matter and energy can be transferred between system and surrounding D. Energy can be converted from one to another but cannot be created or destroyed
Which of the following statements is false? a. Entropies of ionic solids that have similar formulas are larger when the attractions among the ions are stronger. b. Entropy usually decreases when a gas is dissolved in a liquid. c. Entropy usually increases when a pure liquid or solid dissolves in a solvent. d. Entropies of more complex molecules are larger than those of simpler molecules. e. Entropies of gases are usually much larger that those of liquids, which in turn are usually larger than those of solids.
Please answer question A and B.
Which has lower entropy? CO2(g) or CH4(g)?
is gas C. solid 3. Which of the following is a A. ripening of fruits B. liquid nonspontaneous process? C. coffee getting colder B. a ball rolling upwards D. a drop of ink dispersing in water 4. What happens to entropy when solid carbon dioxide (dry ice) sublimes? A. It decreases B. it increases C. It stays the same D. cannot be determined 5. What is the value for standard temperature and pressure or STP? A. 25°C and 10 atm B. 25°C and 1 atm C. 100°C and 1 atm D. 32°C and 10 atm 6. Who is the proponent of the Gibbs free energy? A. William Friedrich B. Guglielmo Marconi C. William Gibbs D. Janno Gibbs 7. When AG H2(g) = 130.6, 12 (s) = 116.7 and Hl (g) = 206.3 A. AS = +165.3 J/K B. AS = -165.3 J/K C. AS = -41 J/K D. AS = +453.6 J/K 9. What value of Gibbs free energy can we safely predict that the reaction is spontaneous at all temperatures? A. a negative value C. a positive value at a low temperature B. a positive value D. a positive value at a high temperature 10. What will be the…
Which of the following is true ? X. Exothermic reactions are spontaneous because formation of products is favored by decrease of free energy of the system Y. All spontaneous reactions accompanied by increase of entropy of the universum. Z. All spontaneous reactions accompanied by increase of entropy of the system. * Y only * X, Y and Z * Y and Z only * X only * X and Z only * Z only * X and Y only * none of them
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TRUE OR FALSE? If the system is in order manner, the change in entropy is lower. Which of the following decreases in entrophy? Ice cream melts Water vapor deposits as ice crystals on cold window panel Iodine crystals undergo sublimation Sugar dissolves in a cup of water Water is heated until lukewarm
Multiple Choice 1. This overall reaction is best described as being: a. exothermic b. endothermic c. endergonic d. exergonic e. spontaneous in the forward direction a. -35800 kJ/mol b. 173.4 kJ/mol c. 35800 kJ/mol d. 101.7 kJ/mol e. -274.2 kJ/mol a. +0.46 V b. +0.617 V c. +1.39 V d. -0.46 V e. +1.21 V G a. 147 g Al b. 0.606 g Al c. 4.55 × 10-3 g Al Reactants 2. At 298 K, AH° for the following reaction is -137.5 kJ/mol, and AS° is +120.5 J/K. Calculate the value of AG° for this reaction at 298 K. C2H4 (g) + H2 (g) C2H6 (g) d. 16.4 g Al e. 49.1 g Al X Reactants 2Fe2+ (aq) + Sn4+ (aq) Products 3. Use the Table to calculate the standard cell potential (Eºcell) for the voltaic cell based on the reaction below. Sn2+ (aq) + 2Fe3+, (aq) Reaction progress Products Half-reaction Cr³+ (aq) + 3e- Fe2+ (aq) + 2e- Fe3+ (aq) + e- → Sn4+ (aq) + 2e- → → Cr (s) Fe (s) Fe2+ (s) Sn²+ (aq) 4. How many grams of aluminum metal are produced in the electrolysis of molten AIC13 for 3.25 br with an electrical…
5. Which of the following has a negative DS? A. Dissolve salt in water B. Heating chlorine vapors C. Heating a pure liquid D. Deposition of a gas to a solid 6. Which of the following has a negative DS? A. Melting ice B. Freezing liquid bromine C. Subliming a solid to a gas D. Evaporating water 7. What is defined as the phenomenon where the entropy of the universe increases in a spontaneous process and is constant in an equilibrium process? A. The law of spontaneity B. The 1st law of thermodynamics C. The 2nd law of thermodynamics D. The 3rd law of thermodynamics.