Question 1

Identify a substance that is NOT in its standard state.

Accepted Answer

A)  O2 
B)  Zn 
C)  H 
D)  O3 
E)  Xe 
A)  O2 
B)  Zn 
C)  H 
D)  O3 
E)  Xe

Question 2

Why are the standard heats of formation for elements in their most stable form assigned a value of "0"?

Accepted Answer

We can't measure absolute enthalpy,but w

Question 3

Calculate the work,w,gained or lost by the system when a gas expands from 15 L to 40 L against a constant external pressure of 1.5 atm.1 L ∙ atm = 101 J

Accepted Answer

A)  -6.1 kJ 
B)  -3.8 kJ 
C)  +3.8 kJ 
D)  +6.1 kJ 
A)  -6.1 kJ 
B)  -3.8 kJ 
C)  +3.8 kJ 
D)  +6.1 kJ

Question 4

It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0°C to 68.0°C.What is the specific heat of benzene?

Accepted Answer

A)  1. 14 J/(g ∙ °
C)  
B)  1.72 J/(g ∙ °
C)  
C)  3.48 J/(g ∙ °
C)  
D)  5. 25 J/(g ∙ °
C)  
A)  1. 14 J/(g ∙ °
C)  
B)  1.72 J/(g ∙ °
C)  
C)  3.48 J/(g ∙ °
C)  
D)  5. 25 J/(g ∙ °
C)

Question 5

Identify what a coffee cup calorimeter measures.

Accepted Answer

A)  measures ΔH for aqueous solutions 
B)  measures ΔE for hydrolysis reactions 
C)  measures ΔH for reduction solutions 
D)  measures ΔT for combustion solutions 
E)  measures ΔE for oxidation reactions 
A)  measures ΔH for aqueous solutions 
B)  measures ΔE for hydrolysis reactions 
C)  measures ΔH for reduction solutions 
D)  measures ΔT for combustion solutions 
E)  measures ΔE for oxidation reactions

Identify a substance that is NOT in its standard state.

Why are the standard heats of formation for elements in their most stable form assigned a value of "0"?

Calculate the work,w,gained or lost by the system when a gas expands from 15 L to 40 L against a constant external pressure of 1.5 atm.1 L ∙ atm = 101 J

It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0°C to 68.0°C.What is the specific heat of benzene?

Identify what a coffee cup calorimeter measures.

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters

Exam 10: Thermochemistry

Identify a substance that is NOT in its standard state.

Why are the standard heats of formation for elements in their most stable form assigned a value of "0"?

Calculate the work,w,gained or lost by the system when a gas expands from 15 L to 40 L against a constant external pressure of 1.5 atm.1 L ∙ atm = 101 J

It takes 11.2 kJ of energy to raise the temperature of 145 g of benzene from 23.0°C to 68.0°C.What is the specific heat of benzene?

Identify what a coffee cup calorimeter measures.

Essentials: Units, Measurements, and Problem Solving

Atoms

The Quantum Mechanical Model of the Atom

Periodic Properties of the Elements

Molecules and Compounds

Chemical Bonding I

Chemical Bonding Ii

Chemical Reactions and Chemical Quantities

Introduction to Solutions and Aqueous Reactions

Gases

Liquids, Solids, and Intermolecular Forces

Crystalline Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Transition Metals and Coordination Compounds

Filters