Question 1

The force exerted by gravity on a 25 lb object lifted to a height of 6.0ft above the ground is _____ N. ( Given work done = 2.0 × 102 J)

Accepted Answer

A)  1.1 × 102 
B)  1.8 × 102 
C)  11 × 102 
D)  2.0 × 102 
E)  2.4 × 102 
A)  1.1 × 102 
B)  1.8 × 102 
C)  11 × 102 
D)  2.0 × 102 
E)  2.4 × 102

Question 2

_____ is an example of a state function.

Accepted Answer

A)  Pressure-volume work 
B)  Mechanical work 
C)  Heat 
D)  Pressure 
E)  Distance 
A)  Pressure-volume work 
B)  Mechanical work 
C)  Heat 
D)  Pressure 
E)  Distance

Question 3

The amount of heat absorbed by 500.0 kg sodium chloride used in a thermal energy storage unit, when the temperature of the salt increases from 15.0 oC to 38.0oC is _____. (Given, Cs of NaCl = 0.864 J/g.oC)

Accepted Answer

A)  9.94 × 103 kJ 
B)  9.94 × 106 kJ 
C)  1.64 × 103 kJ 
D)  1.64 × 104 kJ 
E)  8.63 × 106 kJ 
A)  9.94 × 103 kJ 
B)  9.94 × 106 kJ 
C)  1.64 × 103 kJ 
D)  1.64 × 104 kJ 
E)  8.63 × 106 kJ

Question 4

_____ is the flow of thermal energy between objects with different temperatures.

Accepted Answer

The answer of _____ is the flow of thermal energy...

Question 5

Electrical energy is the energy carried by light, microwaves, and radio waves.

Accepted Answer

A) True 
 B)False

Question 6

The boiling point of a metal is 2519 K. The same point when measured using a Fahrenheit scale is _____ oF.

Accepted Answer

A)  4075 
B)  5081 
C)  3091 
D)  6519 
E)  4282 
A)  4075 
B)  5081 
C)  3091 
D)  6519 
E)  4282

Question 7

The units of specific heat (Cs) are J/(mol.0°C)

Accepted Answer

A) True 
 B)False

Question 8

The energy that is stored in an object because of its relative positions or orientations of its components is called _____.

Accepted Answer

The answer of The energy that is stored in an...

Question 9

Explain with an example, how potential energy is transformed into kinetic energy.

Accepted Answer

Student examples will vary.
A person sta

Question 10

The number of calories expended by a 60.0 kg person bicycling at 15.0 miles per hour is _____ kcal.

Accepted Answer

A)  3.22 × 10-1 
B)  2.32 × 10-1 
C)  6.44 × 10-1 
D)  4.46 × 10-1 
E)  5.46 × 10-1 
A)  3.22 × 10-1 
B)  2.32 × 10-1 
C)  6.44 × 10-1 
D)  4.46 × 10-1 
E)  5.46 × 10-1

Question 11

If the enthalpy of a reaction is negative, then the enthalpy of the products is greater than the enthalpy of the reactants.

Accepted Answer

A) True 
 B)False

Question 12

The enthalpy of combustion is negative for all the substances that can be burned.

Accepted Answer

A) True 
 B)False

Question 13

_____ is a type of coal that has the lowest oxygen content and the highest ΔHcomb.

Accepted Answer

A)  Bituminous 
B)  Subbituminous 
C)  Steam coal 
D)  Lignite 
E)  Anthracite 
A)  Bituminous 
B)  Subbituminous 
C)  Steam coal 
D)  Lignite 
E)  Anthracite

Question 14

The amount of energy released during the combustion of 0.018 gal of ethanol that has a density of 0.78 g/mL is _____ kJ. (Given ΔHocomb of ethanol = -1371 kJ/mol).

Accepted Answer

A)  -2.0 × 103 
B)  -3.0 × 103 
C)  -4.5 × 103 
D)  -0.5 × 103 
E)  -1.6 × 103 
A)  -2.0 × 103 
B)  -3.0 × 103 
C)  -4.5 × 103 
D)  -0.5 × 103 
E)  -1.6 × 103

Question 15

The _____ refers the distribution and flow of carbon throughout the planet.

Accepted Answer

The answer of The _____ refers the distribution and flow...

Question 16

In the Fahrenheit scale, the melting point of ice is designated as 32o.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is an essential amino acid?

Accepted Answer

A)  Glycine 
B)  Threonine 
C)  Alanine 
D)  Serine 
E)  Aspartic acid 
A)  Glycine 
B)  Threonine 
C)  Alanine 
D)  Serine 
E)  Aspartic acid

Question 18

The degree on Kelvin scale is of the same size as the degree on the Fahrenheit scale, and hence can be easily converted from one to the other.

Accepted Answer

A) True 
 B)False

Question 19

A(n) _____ is a property of a system whose magnitude depends only on the present state of the system, not its previous history.

Accepted Answer

The answer of A(n) _____ is a property of a...

Question 20

_____ describes a set of techniques employed to measure enthalpy changes in chemical processes using calorimeters.

Accepted Answer

The answer of _____ describes a set of techniques employed...

Exam 5: Energy Changes in Chemical Reactions

The force exerted by gravity on a 25 lb object lifted to a height of 6.0ft above the ground is _____ N. ( Given work done = 2.0 × 102 J)

_____ is an example of a state function.

The amount of heat absorbed by 500.0 kg sodium chloride used in a thermal energy storage unit, when the temperature of the salt increases from 15.0 oC to 38.0oC is _____. (Given, Cs of NaCl = 0.864 J/g.oC)

_____ is the flow of thermal energy between objects with different temperatures.

Electrical energy is the energy carried by light, microwaves, and radio waves.

The boiling point of a metal is 2519 K. The same point when measured using a Fahrenheit scale is _____ oF.

The units of specific heat (Cs) are J/(mol.0°C)

The energy that is stored in an object because of its relative positions or orientations of its components is called _____.

Explain with an example, how potential energy is transformed into kinetic energy.

The number of calories expended by a 60.0 kg person bicycling at 15.0 miles per hour is _____ kcal.

If the enthalpy of a reaction is negative, then the enthalpy of the products is greater than the enthalpy of the reactants.

The enthalpy of combustion is negative for all the substances that can be burned.

_____ is a type of coal that has the lowest oxygen content and the highest ΔHcomb.

The amount of energy released during the combustion of 0.018 gal of ethanol that has a density of 0.78 g/mL is _____ kJ. (Given ΔHocomb of ethanol = -1371 kJ/mol).

The _____ refers the distribution and flow of carbon throughout the planet.

In the Fahrenheit scale, the melting point of ice is designated as 32o.

Which of the following is an essential amino acid?

The degree on Kelvin scale is of the same size as the degree on the Fahrenheit scale, and hence can be easily converted from one to the other.

A(n) _____ is a property of a system whose magnitude depends only on the present state of the system, not its previous history.

_____ describes a set of techniques employed to measure enthalpy changes in chemical processes using calorimeters.

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

Filters

The force exerted by gravity on a 25 lb object lifted to a height of 6.0ft above the ground is _____ N. ( Given work done = 2.0 × 10² J)

The amount of heat absorbed by 500.0 kg sodium chloride used in a thermal energy storage unit, when the temperature of the salt increases from 15.0^oC to 38.0^oC is _____. (Given, C_s of NaCl = 0.864 J/g.^oC)

The boiling point of a metal is 2519 K. The same point when measured using a Fahrenheit scale is _____ ^oF.

The units of specific heat (C_s) are J/(mol.0°C)

_____ is a type of coal that has the lowest oxygen content and the highest ΔH_comb.

The amount of energy released during the combustion of 0.018 gal of ethanol that has a density of 0.78 g/mL is _____ kJ. (Given ΔH^o_c_omb of ethanol = -1371 kJ/mol).

In the Fahrenheit scale, the melting point of ice is designated as 32^o.