Liquid ammonia (boiling point = -33.4$\degree$C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(l) from -65.0$\degree$C to -12.0$\degree$C? Specific heat capacity, NH3(l) : 4.7 J/(g ? K) Specific heat capacity, NH3(g): 2.2 J/(g ? K) Heat of vaporization: 23.5 kJ/mol Molar mass, ?: 17.0 g/mol

A) 5.5 kJ B) 6.3 kJ C) 39 kJ D) 340 kJ E) 590 kJ A) 5.5 kJ B) 6.3 kJ C) 39 kJ D) 340 kJ E) 590 kJ

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

A 5.00 g sample of water vapor, initially at 155 $\degree$ C is cooled at atmospheric pressure, producing ice at -55 $\degree$ C. Calculate the amount of heat energy lost by the water sample in this process, in kJ. Use the following data: specific heat capacity of ice is 2.09 J/g ? K; specific heat capacity of liquid water is 4.18 J/g ? K; specific heat capacity of water vapor is 1.84 J/g ? K; heat of fusion of ice is 336 J/g; heat of vaporization of water is 2260 J/g.

(Multiple Choice)

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Question 41

Which of the following statements about ceramics is incorrect?

(Multiple Choice)

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Question 42

A metal such with a face-centered cubic lattice will have ________________ atom(s) per unit cell.

(Multiple Choice)

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Question 43

Which of the following statements about the packing of monatomic solids with different unit cells is incorrect?

(Multiple Choice)

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Question 44

What word best describes the type of liquid crystal represented in this figure?

(Multiple Choice)

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Question 45

Liquid ammonia (boiling point = -33.4 $\degree$ C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH₃(l) from -65.0 $\degree$ C to -12.0 $\degree$ C? Specific heat capacity, NH₃(l) : 4.7 J/(g ? K) Specific heat capacity, NH₃(g): 2.2 J/(g ? K) Heat of vaporization: 23.5 kJ/mol Molar mass, ?: 17.0 g/mol

(Multiple Choice)

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Question 46

In which of the following compounds will the molecules not form hydrogen bonds with each other?

(Multiple Choice)

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Question 47

Diethyl ether, used as a solvent for extraction of organic compounds from aqueous solutions, has a high vapor pressure which makes it a potential fire hazard in laboratories in which it is used. How much energy is released when 100.0 g is cooled from 53.0 $\degree$ C to 10.0 $\degree$ C? Boiling point: 34.5 $\degree$ C Heat of vaporization: 351 J/g Specific heat capacity, (CH₃)₂O(l): 3.74 J/(g ? K) Specific heat capacity, (CH₃)₂O(g): 2.35 J/(g ? K)

(Multiple Choice)

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Question 48

The strongest intermolecular interactions between hydrogen sulfide (H₂S) molecules arise from

(Multiple Choice)

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Question 49

A) State the essential requirements for hydrogen bonding to be important in a compound. B) List four properties of water which are significantly influenced by the presence of hydrogen bonding.

(Essay)

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Question 50

, the device/material produced is a/an

(Multiple Choice)

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Question 51

Which of the following is true about kinetic energy, E_k, and potential energy, E_p, when ethyl alcohol at 40 $\degree$ C is compared with ethyl alcohol at 20 $\degree$ C?

(Multiple Choice)

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Question 52

Which one of the following substances will have hydrogen bonds between molecules?

(Multiple Choice)

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Question 53

Some of the information obtained from the heating or cooling curve of a substance can also be found on a phase diagram of that substance.

(True/False)

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Question 54

Which of the following atoms should have the smallest polarizability?

(Multiple Choice)

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Question 55

Use molecular orbital band diagrams to explain why metals are good conductors but semiconductors are not.

(Essay)

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Question 56

What types of forces exist between molecules of CO₂?

(Multiple Choice)

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Question 57

Hexagonal close packing of identical atoms occurs when close-packed layers are stacked in an abcabc.... arrangement.

(True/False)

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Question 58

Polonium crystallizes in the simple cubic lattice. What is the coordination number for Po?

(Multiple Choice)

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Question 59

The phase diagram for xenon has a solid-liquid curve with a positive slope. Which of the following is true?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 97

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

Which of the following statements about ceramics is incorrect?

A metal such with a face-centered cubic lattice will have ________________ atom(s) per unit cell.

Which of the following statements about the packing of monatomic solids with different unit cells is incorrect?

What word best describes the type of liquid crystal represented in this figure?

In which of the following compounds will the molecules not form hydrogen bonds with each other?

The strongest intermolecular interactions between hydrogen sulfide (H2S) molecules arise from

A) State the essential requirements for hydrogen bonding to be important in a compound. B) List four properties of water which are significantly influenced by the presence of hydrogen bonding.

, the device/material produced is a/an

Which of the following is true about kinetic energy, Ek, and potential energy, Ep, when ethyl alcohol at 40 °\degree° C is compared with ethyl alcohol at 20 °\degree° C?

Which one of the following substances will have hydrogen bonds between molecules?

Some of the information obtained from the heating or cooling curve of a substance can also be found on a phase diagram of that substance.

Which of the following atoms should have the smallest polarizability?

Use molecular orbital band diagrams to explain why metals are good conductors but semiconductors are not.

What types of forces exist between molecules of CO2?

Hexagonal close packing of identical atoms occurs when close-packed layers are stacked in an abcabc.... arrangement.

Polonium crystallizes in the simple cubic lattice. What is the coordination number for Po?

The phase diagram for xenon has a solid-liquid curve with a positive slope. Which of the following is true?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

The strongest intermolecular interactions between hydrogen sulfide (H₂S) molecules arise from

Which of the following is true about kinetic energy, E_k, and potential energy, E_p, when ethyl alcohol at 40 $\degree$ C is compared with ethyl alcohol at 20 $\degree$ C?

What types of forces exist between molecules of CO₂?