Question 1

Fiber contributes to the caloric content of food in humans.

Accepted Answer

A) True 
 B)False  False

Question 2

The _____ of an object is a measure of its thermal energy content.

Accepted Answer

temperature

Question 3

Coal contains large number of _____ atoms in their structure that link parts of the structure together, in addition to the basic framework of carbon-carbon bonds.

Accepted Answer

A)  hydrogen 
B)  sulfur 
C)  oxygen 
D)  helium 
E)  nitrogen 
A)  hydrogen 
B)  sulfur 
C)  oxygen 
D)  helium 
E)  nitrogen C

Question 4

A cereal bar weighing 50.0 g has a caloric content of 350.0 calories. The amount of energy contained in the bar is _____ J/g.

Accepted Answer

A)  2.63 × 101 
B)  2.28 × 101 
C)  2.93 × 101 
D)  0.29 × 101 
E)  1.46 × 101 
A)  2.63 × 101 
B)  2.28 × 101 
C)  2.93 × 101 
D)  0.29 × 101 
E)  1.46 × 101

Question 5

_____ is the thermal energy that can be transferred from an object at one temperature to an object at another temperature.

Accepted Answer

The answer of _____ is the thermal energy that can...

Question 6

What are the factors that influence the amount of work done while moving an object?

Accepted Answer

Work done, w = mad
@#LAT-DLM&m

Question 7

In an exothermic process:

Accepted Answer

A)  the volume of the system decreases at constant pressure. 
B)  the heat is transferred to the system from its surroundings. 
C)  the value of q is less than zero by convention. 
D)  the enthalpy of products is greater than the enthalpy of the reactants. 
E)  the enthalpy of the reaction is positive. 
A)  the volume of the system decreases at constant pressure. 
B)  the heat is transferred to the system from its surroundings. 
C)  the value of q is less than zero by convention. 
D)  the enthalpy of products is greater than the enthalpy of the reactants. 
E)  the enthalpy of the reaction is positive.

Question 8

A(n) _____ system exchanges neither energy nor matter with the surroundings.

Accepted Answer

The answer of A(n) _____ system exchanges neither energy nor...

Question 9

Which of the following devices is best suited to measure the enthalpy changes that accompany combustion reactions?

Accepted Answer

A)  Coffee-cup calorimeter 
B)  Constant-pressure calorimeter 
C)  Bomb calorimeter 
D)  Heat balance calorimeter 
E)  Constant flux calorimeter 
A)  Coffee-cup calorimeter 
B)  Constant-pressure calorimeter 
C)  Bomb calorimeter 
D)  Heat balance calorimeter 
E)  Constant flux calorimeter

Question 10

What is syngas?

Accepted Answer

Syngas is a clean-burning mixt

Question 11

The use of units in a calculation to ensure that the final units obtained are proper is called _____.

Accepted Answer

dimensiona

Question 12

What are the different approaches that can be used to determine the caloric content of foods?

Accepted Answer

The most precise method used to determin

Question 13

Which of the following has the highest heat capacity?

Accepted Answer

A)  Methanol 
B)  Benzene 
C)  Graphite 
D)  Liquid water 
E)  Water vapour 
A)  Methanol 
B)  Benzene 
C)  Graphite 
D)  Liquid water 
E)  Water vapour

Question 14

The energy required by a 55 kg person to climb a 1-story building (Assume each flight of stairs is 18 ft high.) is _____ kcal.

Accepted Answer

A)  2.56 
B)  0.0256 
C)  0.700 
D)  3.51 
E)  9.71 
A)  2.56 
B)  0.0256 
C)  0.700 
D)  3.51 
E)  9.71

Question 15

The kinetic energy of a bicycle that weighs 23.5 kg moving at a speed of 25.0 miles per hour is _____ J.

Accepted Answer

A)  5.87 × 103 
B)  2.93 × 103 
C)  2.68 × 103 
D)  0.29 × 103 
E)  1.47 × 103 
A)  5.87 × 103 
B)  2.93 × 103 
C)  2.68 × 103 
D)  0.29 × 103 
E)  1.47 × 103

Question 16

The negative sign associated with the pressure-volume work done indicates that the system gains energy.

Accepted Answer

A) True 
 B)False

Question 17

What is the SI unit of energy?

Accepted Answer

A)  Fahrenheit 
B)  Joules 
C)  Newton 
D)  Pascal 
E)  Ohm 
A)  Fahrenheit 
B)  Joules 
C)  Newton 
D)  Pascal 
E)  Ohm

Question 18

Define standard enthalpies of formation.

Accepted Answer

The standard enthalpies of formation (ΔH

Question 19

The balanced chemical equation corresponding to the standard enthalpy of formation of NaCl is:

Accepted Answer

A)  Na2(s) + Cl2(g) → 2NaCl(s). 
B)  2Na(s) + Cl2(g) → 2NaCl(s). 
C)  Na(s) + Cl2 (g)→ NaCl(s). 
D)  Na(s) + ½ Cl2(g)→ NaCl(s). 
E)  Na(s) + Cl(g)→ NaCl(s). 
A)  Na2(s) + Cl2(g) → 2NaCl(s). 
B)  2Na(s) + Cl2(g) → 2NaCl(s). 
C)  Na(s) + Cl2 (g)→ NaCl(s). 
D)  Na(s) + ½ Cl2(g)→ NaCl(s). 
E)  Na(s) + Cl(g)→ NaCl(s).

Question 20

The amount of heat absorbed or released by the calorimeter is equal in magnitude and opposite in sign to the amount of heat produced or consumed by the reaction.

Accepted Answer

A) True 
 B)False

Exam 5: Energy Changes in Chemical Reactions

Fiber contributes to the caloric content of food in humans.

The _____ of an object is a measure of its thermal energy content.

Coal contains large number of _____ atoms in their structure that link parts of the structure together, in addition to the basic framework of carbon-carbon bonds.

A cereal bar weighing 50.0 g has a caloric content of 350.0 calories. The amount of energy contained in the bar is _____ J/g.

_____ is the thermal energy that can be transferred from an object at one temperature to an object at another temperature.

What are the factors that influence the amount of work done while moving an object?

In an exothermic process:

A(n) _____ system exchanges neither energy nor matter with the surroundings.

Which of the following devices is best suited to measure the enthalpy changes that accompany combustion reactions?

What is syngas?

The use of units in a calculation to ensure that the final units obtained are proper is called _____.

What are the different approaches that can be used to determine the caloric content of foods?

Which of the following has the highest heat capacity?

The energy required by a 55 kg person to climb a 1-story building (Assume each flight of stairs is 18 ft high.) is _____ kcal.

The kinetic energy of a bicycle that weighs 23.5 kg moving at a speed of 25.0 miles per hour is _____ J.

The negative sign associated with the pressure-volume work done indicates that the system gains energy.

What is the SI unit of energy?

Define standard enthalpies of formation.

The balanced chemical equation corresponding to the standard enthalpy of formation of NaCl is:

The amount of heat absorbed or released by the calorimeter is equal in magnitude and opposite in sign to the amount of heat produced or consumed by the reaction.

Introduction to Chemistry

Molecules, Ions, and Chemical Formulas

Chemical Reactions

Reactions in Aqueous Solution

The Structure of Atoms

The Periodic Table and Periodic Trends

Ionic Versus Covalent Bonding

Molecular Geometry and Covalent Bonding Models

Gases

Liquids

Solids

Solutions

Chemical Kinetics

Chemical Equilibrium

Aqueous Acidbase Equilibriums

Solubility and Complexation Equilibriums

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Periodic Trends and the S-Block Elements

The P-Block Elements

The D-Block Elements

Organic Compounds

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