Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chemistry, The Central Science, 11th edition Theodore L. Brown, H. Eugene LeMay, Jr., Bruce E. Bursten, and Catherine J. Murphy Dana & Michelle Chatellier.

Similar presentations


Presentation on theme: "Chemistry, The Central Science, 11th edition Theodore L. Brown, H. Eugene LeMay, Jr., Bruce E. Bursten, and Catherine J. Murphy Dana & Michelle Chatellier."— Presentation transcript:

1 Chemistry, The Central Science, 11th edition Theodore L. Brown, H. Eugene LeMay, Jr., Bruce E. Bursten, and Catherine J. Murphy Dana & Michelle Chatellier University of Delaware © Copyright 2009, Pearson Education Chapter 19 Chemical Thermodynamics

2 The first law of thermodynamics states that __________ is conserved. a.matter b.energy c.entropy d.temperature

3 The first law of thermodynamics states that __________ is conserved. a.matter b.energy c.entropy d.temperature

4 Which process is NOT spontaneous at 25 °C? a.the melting of an ice cube b.the sublimation of dry ice c.the boiling of liquid nitrogen d.the freezing of ethyl alcohol

5 Which process is NOT spontaneous at 25 °C? a.the melting of an ice cube b.the sublimation of dry ice c.the boiling of liquid nitrogen d.the freezing of ethyl alcohol

6 Entropy is a measure of the __________ of a system. a.randomness b.internal energy c.temperature d.polarity

7 Entropy is a measure of the __________ of a system. a.randomness b.internal energy c.temperature d.polarity

8 Since entropy is a state function, the change in entropy is equal to its final value __________ its initial value. a.plus b.minus c.multiplied by d.divided by

9 Since entropy is a state function, the change in entropy is equal to its final value __________ its initial value. a.plus b.minus c.multiplied by d.divided by

10 Boltzmanns constant = k. The number of microstates = W. Entropy = S. Which is correct? a. S = k x W b. S = k / W c. S = k ln W d. S = k W

11 Boltzmanns constant = k. The number of microstates = W. Entropy = S. Which is correct? a. S = k x W b. S = k / W c. S = k ln W d. S = k W

12 Entropy decreases when: a.gases are formed from liquids. b.liquids are formed from solids. c.solids are formed from gases. d.the number of gas molecules increases during a chemical reaction.

13 Entropy decreases when: a.gases are formed from liquids. b.liquids are formed from solids. c.solids are formed from gases. d.the number of gas molecules increases during a chemical reaction.

14 The second law of thermodynamics states that entropy __________ as a result of an irreversible process. a.increases b.decreases c.remains unchanged d.reaches equilibrium

15 The second law of thermodynamics states that entropy __________ as a result of an irreversible process. a.increases b.decreases c.remains unchanged d.reaches equilibrium

16 The third law of thermodynamics states that the entropy of a pure, perfect crystalline substance at absolute zero (0 K) is: a.infinite. b.increasing. c.decreasing. d.zero.

17 The third law of thermodynamics states that the entropy of a pure, perfect crystalline substance at absolute zero (0 K) is: a.infinite. b.increasing. c.decreasing. d.zero.

18 H = enthalpy. S = entropy. T = Kelvin temperature. The Gibbs free energy, G, is: a. H + TS b. H – TS c. H x TS d. H / TS

19 H = enthalpy. S = entropy. T = Kelvin temperature. The Gibbs free energy, G, is: a. H + TS b. H – TS c. H x TS d. H / TS

20 The value of G, the Gibbs free energy change, for a system at equilibrium is: a.positive. b.negative. c.rapidly fluctuating from positive to negative. d.zero.

21 The value of G, the Gibbs free energy change, for a system at equilibrium is: a.positive. b.negative. c.rapidly fluctuating from positive to negative. d.zero.


Download ppt "Chemistry, The Central Science, 11th edition Theodore L. Brown, H. Eugene LeMay, Jr., Bruce E. Bursten, and Catherine J. Murphy Dana & Michelle Chatellier."

Similar presentations


Ads by Google