The eutectics, congruent and incongruent melting compounds have to be identified. Concept introduction: Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

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Answer 1

Question

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

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Answer 2

Question

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

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Answer 3

Question

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

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Answer 4

Question

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

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Answer 5

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 6

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 7

Chapter 5, Problem 5D.5P

(a)

Interpretation Introduction

Interpretation:

The eutectics, congruent and incongruent melting compounds have to be identified.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The number of phases and phase composition present in equilibrium when a melt with composition xSi = 0.20 at 1500 °C is cooled to 1000 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 10

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 11

(c)

Interpretation Introduction

Interpretation:

The equilibrium phases observed when a melt with xSi=0.80 is cooled to 1030 °C have to be described. The phases and relative amounts that would be at equilibrium at a temperature (i) slightly higher than 1030 °C, (ii) slightly lower than 1030 °C have to be stated.

Concept introduction:

Eutectic points are the lowest melting points of the mixtures. Congruent melting compounds are those which remain stable upto their melting points. Incongruent melting compounds are those which decompose into other products before reaching their melting point.

Answer 12

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Answer 13

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Answer 15

Ch. 5 - Prob. 5A.1ST Ch. 5 - Prob. 5A.2ST Ch. 5 - Prob. 5A.3ST Ch. 5 - Prob. 5A.4ST Ch. 5 - Prob. 5B.2ST Ch. 5 - Prob. 5C.2ST Ch. 5 - Prob. 5F.1ST Ch. 5 - Prob. 5A.1DQ Ch. 5 - Prob. 5A.2DQ Ch. 5 - Prob. 5A.3DQ

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Chapter 5 Solutions