(a) To determine: The spontaneity and temperature dependency for Δ H ; n e g a t i v e , Δ S ; p o s i t i v e

Question

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Answer 1

Question

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

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(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer

34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

Answer 2

Question

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Expert Solution & Answer

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Answer 3

Question

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Expert Solution & Answer

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Answer 4

Question

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Expert Solution & Answer

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Answer 5

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Answer 6

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Answer 7

Chapter 19, Problem 18E

Interpretation Introduction

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

Answer 8

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Answer 9

Interpretation Introduction

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

Answer 10

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Answer 11

Interpretation Introduction

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

Answer 12

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Answer 13

Interpretation Introduction

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

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Answer 17

Ch. 19 - Which reaction Is most likely to have a positive...Ch. 19 - Prob. 2SAQ Ch. 19 - Arrange the gases—F2, Ar, and CH3F—in order of...Ch. 19 - Prob. 4SAQ Ch. 19 - Prob. 5SAQ Ch. 19 - For a certain reaction Hrxn=255kJ and Srxn=211J/K...Ch. 19 - Prob. 7SAQ Ch. 19 - s8. Use standard free energies of formation to...Ch. 19 - Prob. 9SAQ Ch. 19 - For the following reaction, Grxn=9.4kJ at 25 °C....

(a) To determine: The spontaneity and temperature dependency for Δ H ; n e g a t i v e , Δ S ; p o s i t i v e

Solution Summary: The author explains that the spontaneity and temperature dependence in a reaction should be predicted on basis of each given combination of H and S signs for the system.

Videos

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$

Want to see the full answer?

Chapter 19 Solutions

(a) To determine: The spontaneity and temperature dependency for Δ H ; n e g a t i v e , Δ S ; p o s i t i v e

Solution Summary: The author explains that the spontaneity and temperature dependence in a reaction should be predicted on basis of each given combination of H and S signs for the system.

Videos

(a) To determine: The spontaneity and temperature dependency for ΔH;negative,ΔS;positive

(b) To determine: The spontaneity and temperature dependency for ΔH;positive,ΔS;negative

(c) To determine: The spontaneity and temperature dependency for ΔH;negative,ΔS;negative

(d) To determine: The spontaneity and temperature dependency for ΔH;positive,ΔS;positive

Want to see the full answer?

Chapter 19 Solutions

(a)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; p o s i t i v e$

(b)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; n e g a t i v e$

(c)

To determine:

The spontaneity and temperature dependency for $Δ H; n e g a t i v e, Δ S; n e g a t i v e$

(d)

To determine:

The spontaneity and temperature dependency for $Δ H; p o s i t i v e, Δ S; p o s i t i v e$