gibbs energy phase diagram question
Which ONE of the following statements is INCORRECT?
(A) The triple point of a phase diagram shows the temperature and pressure at which three phases of a substance are in equilibrium.
(B) When considering a reaction, the total Gibbs energy change for a system does not depend on any Gibbs energy of mixing.
(C) At the freezing temperature of a liquid, DG = 0.
(D) The equilibrium composition of a reaction mixture represents the system where the Gibbs energy is at a minimum.
(E) The solubility of most gases in water decreases with an increase in temperature.
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An isobaric Water-Glycol phase diagram is given. a) How many components are present and name the...
An isobaric Water-Glycol phase diagram is given. a) How many components are present and name the components? b) What is the minimum composition of glycol (in volume %) and minimum temperature at which liquid exist? c) Write the reaction at the invariant point (triple point) and name it? d) Calculate the maximum number of phases present using Gibbs Phase rule at the invariant point (triple point) and name the phases? Liquid Liquid Temperature °C Ice Liquid Solid Glycol -80 Ice+...
1. Based on the phase diagram in Figure 1, construct the Gibbs free energy curves for...
1. Based on the phase diagram in Figure 1, construct the Gibbs free energy curves for the solid and liquid phases at T1,T2, T3 and T4. Assume that A and 8 components are mutually soluble in any amounts in both solid and liquid phases (unlimited solubility) and form ideal solutions. (30 marks) liquid т, T2=Tmg Jie line solid T. O X х,
What does the triple point on a phase diagram represent? Select one: a. It represents the...
What does the triple point on a phase diagram represent? Select one: a. It represents the conditions under which a substance can exist in two of the three phases in stable form. b. It represents the point at which the distinction between liquid and gas phases becomes unclear. c. It represents the conditions of pressure and temperature under which solid, liquid, and gas all co-exist. d. It represents the point at which the substance undergoes sublimation.
11. (15 Points) The Gibbs free energy of the solid phase and the liquid phase of...
11. (15 Points) The Gibbs free energy of the solid phase and the liquid phase of a substance of one mole are shown (dashed lines) below as a function of T under a constant P- 10' N/m2. The molar volume of the solid and of the liquid are 18 x 103 m/mole and 2.0 x 10 m'/mole, respectivel (a) If one mole of the liquid transforms to the solid under a constant P 10 N/m2, calculate the c hanges of...
6. The Gibbs phase rule F = C - #P + 2 gives F, the number...
6. The Gibbs phase rule F = C - #P + 2 gives F, the number of degrees of freedom or the number of intensive variables (such as pressure, temperature, or mole fraction) that can be independently changed without disturbing the system's equilibrium state. The number of chemical species C is the minimum number needed to describe the composition of all the phases (number of substances minus the number of relations that constrain the amounts of the substances - in...
URGENT Question 3 Consider a binary eutectic phase diagram, shown in the figure below, where substances...
URGENT
Question 3 Consider a binary eutectic phase diagram, shown in the figure below, where substances A and B, which have partial solubility within each other in the solid state, will form the solid a and solid B solution phases. See the eutectic phase diagram containing the partial resolution and explain in detail the phases obtained by drawing the change graphs of the mixture with the mixture of Gibbs free energy at different temperatures. Constants: R=2 cal/molK= 8.32 J/molK=0.082 liter...
ChemActivity T10 Gibbs Energy as a Function of Temperature and Pressure Focus Question: The most stable...
ChemActivity T10 Gibbs Energy as a Function of Temperature and Pressure Focus Question: The most stable phase of a substance at a fixed T,P is that phase with the lowest molar Gibbs energy. If temperature is increased what happens to the Gibbs energy? What happens to the Gibbs energy if pressure is increased? Model 1: The Gibbs Energy. G=U + PV-TS Critical Thinking Questions 1. Describe the meaning of equation 1 using grammatically correct English sentences. 2. Based on equation...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on a (liquid) mixture of A and B at high temperature. Temperature, T DY 0.16 0.23 0.57 0.67 0.84 0.2 0.8 0.4 0.6 Mole fraction of B, XE (a) Label all regions of the diagram according to the chemical species exist in that region and their phases. Be precise the composition of solid formed. (10pt) (b) Indicate the number of species and phases present at...
6. Use the phase diagram below to answer the following questions. Pressure (Atmosphere) 45° 60° 100°...
6. Use the phase diagram below to answer the following questions. Pressure (Atmosphere) 45° 60° 100° 110° Temperature (°C) a. Which section represents the solid phase? b. What section represents the liquid phase? c. What section represents the gas phase? d. What letter represents the triple point? the definition of a triple point? In your own words, what is e. What is this substance's normal melting point, at 1 atmosphere of pressure? f. What is this substance's normal boiling point,...
1. Mark with T (True) or F (False) (2 points each) • A Joule Thompson experiment...
1. Mark with T (True) or F (False) (2 points each) • A Joule Thompson experiment corresponds to a process with constant enthalpy • The state functions (U.H.G.A) act as thermodynamic potentials when represented as functions of their natural variables. • The Gibbs free energy is equal to the maximum PV work done by the system on the envi ronment • The standard enthalpy of formation for any pure element in its reference state is temperature dependent • The phase...
An isobaric Water-Glycol phase diagram is given. a) How many components are present and name the components? b) What is the minimum composition of glycol (in volume %) and minimum temperature at which liquid exist? c) Write the reaction at the invariant point (triple point) and name it? d) Calculate the maximum number of phases present using Gibbs Phase rule at the invariant point (triple point) and name the phases? Liquid Liquid Temperature °C Ice Liquid Solid Glycol -80 Ice+...
1. Based on the phase diagram in Figure 1, construct the Gibbs free energy curves for the solid and liquid phases at T1,T2, T3 and T4. Assume that A and 8 components are mutually soluble in any amounts in both solid and liquid phases (unlimited solubility) and form ideal solutions. (30 marks) liquid т, T2=Tmg Jie line solid T. O X х,
11. (15 Points) The Gibbs free energy of the solid phase and the liquid phase of a substance of one mole are shown (dashed lines) below as a function of T under a constant P- 10' N/m2. The molar volume of the solid and of the liquid are 18 x 103 m/mole and 2.0 x 10 m'/mole, respectivel (a) If one mole of the liquid transforms to the solid under a constant P 10 N/m2, calculate the c hanges of...
6. The Gibbs phase rule F = C - #P + 2 gives F, the number of degrees of freedom or the number of intensive variables (such as pressure, temperature, or mole fraction) that can be independently changed without disturbing the system's equilibrium state. The number of chemical species C is the minimum number needed to describe the composition of all the phases (number of substances minus the number of relations that constrain the amounts of the substances - in...
URGENT
Question 3 Consider a binary eutectic phase diagram, shown in the figure below, where substances A and B, which have partial solubility within each other in the solid state, will form the solid a and solid B solution phases. See the eutectic phase diagram containing the partial resolution and explain in detail the phases obtained by drawing the change graphs of the mixture with the mixture of Gibbs free energy at different temperatures. Constants: R=2 cal/molK= 8.32 J/molK=0.082 liter...
ChemActivity T10 Gibbs Energy as a Function of Temperature and Pressure Focus Question: The most stable phase of a substance at a fixed T,P is that phase with the lowest molar Gibbs energy. If temperature is increased what happens to the Gibbs energy? What happens to the Gibbs energy if pressure is increased? Model 1: The Gibbs Energy. G=U + PV-TS Critical Thinking Questions 1. Describe the meaning of equation 1 using grammatically correct English sentences. 2. Based on equation...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on a (liquid) mixture of A and B at high temperature. Temperature, T DY 0.16 0.23 0.57 0.67 0.84 0.2 0.8 0.4 0.6 Mole fraction of B, XE (a) Label all regions of the diagram according to the chemical species exist in that region and their phases. Be precise the composition of solid formed. (10pt) (b) Indicate the number of species and phases present at...
6. Use the phase diagram below to answer the following questions. Pressure (Atmosphere) 45° 60° 100° 110° Temperature (°C) a. Which section represents the solid phase? b. What section represents the liquid phase? c. What section represents the gas phase? d. What letter represents the triple point? the definition of a triple point? In your own words, what is e. What is this substance's normal melting point, at 1 atmosphere of pressure? f. What is this substance's normal boiling point,...
1. Mark with T (True) or F (False) (2 points each) • A Joule Thompson experiment corresponds to a process with constant enthalpy • The state functions (U.H.G.A) act as thermodynamic potentials when represented as functions of their natural variables. • The Gibbs free energy is equal to the maximum PV work done by the system on the envi ronment • The standard enthalpy of formation for any pure element in its reference state is temperature dependent • The phase...
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