Download presentation

Presentation is loading. Please wait.

1
**Chemical Thermodynamics**

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

2
**The first law of thermodynamics states that __________ is conserved.**

matter energy entropy temperature

3
**The first law of thermodynamics states that __________ is conserved.**

matter energy entropy temperature

4
**Which process is NOT spontaneous at 25 °C?**

the melting of an ice cube the sublimation of dry ice the boiling of liquid nitrogen the freezing of ethyl alcohol

5
**Which process is NOT spontaneous at 25 °C?**

the melting of an ice cube the sublimation of dry ice the boiling of liquid nitrogen the freezing of ethyl alcohol

6
**Entropy is a measure of the __________ of a system.**

randomness internal energy temperature polarity

7
**Entropy is a measure of the __________ of a system.**

randomness internal energy temperature polarity

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

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

10
**Boltzmann’s constant = k. The number of microstates = W. Entropy = S**

Boltzmann’s constant = k. The number of microstates = W. Entropy = S. Which is correct? S = k x W S = k / W S = k ln W S = kW

11
**Boltzmann’s constant = k. The number of microstates = W. Entropy = S**

Boltzmann’s constant = k. The number of microstates = W. Entropy = S. Which is correct? S = k x W S = k / W S = k ln W S = kW

12
**Entropy decreases when:**

gases are formed from liquids. liquids are formed from solids. solids are formed from gases. the number of gas molecules increases during a chemical reaction.

13
**Entropy decreases when:**

gases are formed from liquids. liquids are formed from solids. solids are formed from gases. 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. increases decreases remains unchanged reaches equilibrium

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

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

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

18
**H = enthalpy. S = entropy. T = Kelvin temperature**

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

19
**H = enthalpy. S = entropy. T = Kelvin temperature**

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

20
**The value of ∆G, the Gibbs free energy change, for a system at equilibrium is:**

positive. negative. rapidly fluctuating from positive to negative. zero.

21
**The value of ∆G, the Gibbs free energy change, for a system at equilibrium is:**

positive. negative. rapidly fluctuating from positive to negative. zero.

Similar presentations

OK

The entropy, S, of a system quantifies the degree of disorder or randomness in the system; larger the number of arrangements available to the system, larger.

The entropy, S, of a system quantifies the degree of disorder or randomness in the system; larger the number of arrangements available to the system, larger.

© 2018 SlidePlayer.com Inc.

All rights reserved.

By using this website, you agree with our use of **cookies** to functioning of the site. More info in our Privacy Policy and Google Privacy & Terms.

Ads by Google

Ppt on ar 25-50 Ppt on computer malware scanner Ppt on single phase and three phase dual converter kit Ppt on introduction to product management Ppt on producers consumers and decomposers video Time of flight ms ppt online Ppt on political parties in india Ppt on series and parallel circuits interactive Ppt on renewable energy Ppt on horizontal axis windmill