Study questions -chapt 181. Which of the following changes lead to a decrease in entropy?a. sugar dissolving in coffeeb. mixing of pure gasesc. the sublimation (vaporization) of dry ice (solid carbon dioxide)d. melting snowe. halving the volume of a gas2 At what temperatures will a reaction be spontaneous if A,H° = +117 kJ and A,S° =-35 J/K?3. Calculate A,G° for the following reaction at 425 °C,(8)I + (3)*H_, (3)IHgiven K= 0.018. (R=8.314 J/K-mol)%3D4. For a reaction, A,H° = -208.8 kJ and A,S° =-308.2 J/K. At what temperature will A,G° = 0.00 kJ?%3D%3D5. What is the sign of AH(system) and AS(system) if a chemical reaction is spontaneous at all temperatures under standard conditions?HV ε(system) is negative, and AS(system) is positive.HV °q(system) is negative, and AS(system) is negative.HV(system) is positive, and AS(system) is positive.HV P(system) is positive, and AS(system) is negative.e. none of these6. For which of the following reactions will the entropy of the system decrease?a. 2 NH3(g) → N2(g) + 3 H2(g)b. 2 C(s) + O2(g) → 2 CO(g)C. CACO3(s) → CaO(s) + CO2(g)d. 2 NO2(g) → N20:(g)e. NaOH(s) → Na (aq) + OH (aq)7. Which of the following linear chain alcohols is likely to have the highest standard entropy in the liquid state?a. CH;OH1. 2.Chapt 18b. CH;CH2OHс. CH-CH.CH-OНd. CH;CH2CH2CH2OHe. CH3CH2CH2CH2CH2OH8. The following processes occur spontaneously at 25 °C. Which of these processes is/are endothermic?NH,NO3 dissolving in water (which is accompanied by a cooling of the water).the expansion of a real gas into a vacuum (which is accompanied by a cooling of the1.2.gas).3. liquid water in an ice cube tray freezing into ice after being placed in a freezer.a. 1 onlyb. 2 onlyc. 3 onlyd. 1 and 2e. 1, 2, and 39. For the combustion of acetylene at 298.15 K,2 C¿H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)calculate AS (universe) given AS (system) = -194.6 J/K and AH°(system) = -2511.2 kJ.10. If a chemical reaction occurs in a direction that has a positive change in entropy thena. the change in enthalpy must be negative.b. the reaction must be spontaneous.c. heat goes from the system into the surroundings.d. the reaction must be exothermic.e. the disorder of the system increases.

Entropy is the measure of randomness or disorder in a system.

1. Which of the following changes lead to a decrease in entropy? a. sugar dissolving in coffee b. mixing of pure gases c. the sublimation (vaporization) of dry ice (solid carbon dioxide) d. melting snow e. halving the volume of a gas

1. Which of the following changes lead to a decrease in entropy? a. sugar dissolving in coffee b. mixing of pure gases c. the sublimation (vaporization) of dry ice (solid carbon dioxide) d. melting snow e. halving the volume of a gas

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...

See similar textbooks

Similar questions

4. Select the INCORRECT description about internal energy. * 1 poin O A. Absolute internal energy can be measured O B. Internal energy is the total energy of the system. O C. Internal energy of a system can be changed as work or heat. D. Internal energy is the sum of all kinetic and potential energies of all components in the system. 1 poim 5. Select the TRUE statement regarding a spontaneous reaction. A. Entropy equals to zero. B. Occurs at vacuum condition.
Please answer question A and B.
For each of the following changes, do you expect the entropy to increase or decrease? (These questions do not require calculations.) a. Ammonia gas and hydrogen chloride gas react to deposit solid ammonium chloride on a surface b. Two aqueous solutions are combined to form a precipitate c. Methanol gas condenses to form liquid methanol d. Butane liquid reacts with oxygen gas to form carbon dioxide gas and gaseous water e. Liquid water freezes to form ice f. Solid lead melts g. A solid solute dissolves in a liquid solvent h. Liquid water boils Possible answers: 1. Entropy should increase (more positive) 2. Entropy should decrease (more negative) 3. The change in entropy cannot be determined from the information given
TRUE OR FALSE ONLY NUMBER 8 TO 10 ONLY
Helppppp
Consider samples of ice, water, and water vapor that all equal in mass. Which of the three samples will have the lowest entropy?
13please answer and refer to the periodic table
According to the third law of thermodynamics, at what temperature will entropy become zero? A. 0° B. 25°C C. 0K D. 273 K
Gibbs free energy is the sum of enthalpy change and the product of temperature and entropy. a. True b. False
In biology the equilibrium equations that keep living organisms alive are called homeostasis. How does thermodynamics and entropy in particular effect this process and life in general?
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.
Which species do you expect to have the highest molar entropy? a. CH2Cl2 (g) b. NH3 (g) c. N2O5 (s) d. N2H4 (l)