Question 1

The nitrogen in foods, when burned in a calorimeter is transformed into urea.

Accepted Answer

A) True 
 B)False

Question 2

Anthracite has high sulfur content because of the presence of small particles of pyrite.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following types of coal has high oxygen content and the lowest ΔHcomb?

Accepted Answer

A)  Anthracite 
B)  Lignite 
C)  Subbituminous 
D)  Bituminous 
E)  Graphite 
A)  Anthracite 
B)  Lignite 
C)  Subbituminous 
D)  Bituminous 
E)  Graphite

Question 4

In the human body, the nitrogen from foods is converted to _____ before excretion.

Accepted Answer

The answer of In the human body, the nitrogen from...

Question 5

A process in which heat is transferred from a system to its surroundings is described as _____.

Accepted Answer

The answer of A process in which heat is transferred...

Question 6

Different forms of energy are expressed in different units.

Accepted Answer

A) True 
 B)False

Question 7

The energy that results from atomic or molecular motion is called _____.

Accepted Answer

A)  radiant energy 
B)  chemical energy 
C)  nuclear energy 
D)  thermal energy 
E)  electrical energy 
A)  radiant energy 
B)  chemical energy 
C)  nuclear energy 
D)  thermal energy 
E)  electrical energy

Question 8

A device used to measure enthalpy changes in chemical processes at constant pressure is _____.

Accepted Answer

constant-p

Question 9

The amount of energy released by the combustion of 2 moles of benzene is _____kJ. (ΔHocomb of benzene = -41.8 kJ/g)

Accepted Answer

A)  -3.34 × 103 
B)  -8.36 × 103 
C)  -6.52 × 103 
D)  -5.60 × 103 
E)  -7.21 × 103 
A)  -3.34 × 103 
B)  -8.36 × 103 
C)  -6.52 × 103 
D)  -5.60 × 103 
E)  -7.21 × 103

Question 10

_____ is the amount of energy needed to raise the temperature of an object exactly by 1°C.

Accepted Answer

The answer of _____ is the amount of energy needed...

Question 11

_____ is the partially decayed remains of plants that grow in swampy areas and gives off little heat when burnt.

Accepted Answer

A)  Anthracite 
B)  Graphite 
C)  Peat 
D)  Lignite 
E)  Bituminous coal 
A)  Anthracite 
B)  Graphite 
C)  Peat 
D)  Lignite 
E)  Bituminous coal

Question 12

The standard enthalpy of formation of any element in its most stable state is zero.

Accepted Answer

A) True 
 B)False

Question 13

The work done by a person while moving a 15.0 kg sphere at an acceleration of 2.0 m/s2 to a store at a distance of 6.0 meters from its original position is _____J.

Accepted Answer

A)  1.8 × 102 
B)  0.9 × 102 
C)  1.8 × 101 
D)  18 × 102 
E)  2.5 × 102 
A)  1.8 × 102 
B)  0.9 × 102 
C)  1.8 × 101 
D)  18 × 102 
E)  2.5 × 102

Question 14

The phenomenon in which substances absorb thermal energy radiated by earth, thus trapping thermal energy in the atmosphere is known as _____.

Accepted Answer

The answer of The phenomenon in which substances absorb thermal...

Question 15

In the equation q = mCsΔT, Cs represents _____.

Accepted Answer

A)  heat capacity 
B)  specific heat 
C)  change in enthalpy 
D)  state function 
E)  molar heat capacity 
A)  heat capacity 
B)  specific heat 
C)  change in enthalpy 
D)  state function 
E)  molar heat capacity

Question 16

The hydrogen:carbon mole ratio in lignite is _____.

Accepted Answer

A)  0.5 
B)  0.6 
C)  0.8 
D)  1.0 
E)  0.9 
A)  0.5 
B)  0.6 
C)  0.8 
D)  1.0 
E)  0.9

Question 17

If ΔT and q values are positive, then the heat flows from the surroundings into an object.

Accepted Answer

A) True 
 B)False

Question 18

The _____ is the amount of energy needed to increase the temperature of 1 mol of a substance by 1°C.

Accepted Answer

A)  specific heat 
B)  molar heat capacity 
C)  enthalpy 
D)  state function 
E)  change in enthalpy 
A)  specific heat 
B)  molar heat capacity 
C)  enthalpy 
D)  state function 
E)  change in enthalpy

Question 19

Human body usually exhausts the supply of stored carbohydrates before utilizing the fat reserves.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following can be categorized as potential energy?

Accepted Answer

A)  The energy released during a landslide 
B)  The energy associated with a bullet in a gun 
C)  The energy associated with a moving bicycle 
D)  The energy associated with a swinging pendulum 
E)  The energy released when kicking a ball 
A)  The energy released during a landslide 
B)  The energy associated with a bullet in a gun 
C)  The energy associated with a moving bicycle 
D)  The energy associated with a swinging pendulum 
E)  The energy released when kicking a ball

Exam 5: Energy Changes in Chemical Reactions

The nitrogen in foods, when burned in a calorimeter is transformed into urea.

Anthracite has high sulfur content because of the presence of small particles of pyrite.

Which of the following types of coal has high oxygen content and the lowest ΔHcomb?

In the human body, the nitrogen from foods is converted to _____ before excretion.

A process in which heat is transferred from a system to its surroundings is described as _____.

Different forms of energy are expressed in different units.

The energy that results from atomic or molecular motion is called _____.

A device used to measure enthalpy changes in chemical processes at constant pressure is _____.

The amount of energy released by the combustion of 2 moles of benzene is _____kJ. (ΔHocomb of benzene = -41.8 kJ/g)

_____ is the amount of energy needed to raise the temperature of an object exactly by 1°C.

_____ is the partially decayed remains of plants that grow in swampy areas and gives off little heat when burnt.

The standard enthalpy of formation of any element in its most stable state is zero.

The work done by a person while moving a 15.0 kg sphere at an acceleration of 2.0 m/s2 to a store at a distance of 6.0 meters from its original position is _____J.

The phenomenon in which substances absorb thermal energy radiated by earth, thus trapping thermal energy in the atmosphere is known as _____.

In the equation q = mCsΔT, Cs represents _____.

The hydrogen:carbon mole ratio in lignite is _____.

If ΔT and q values are positive, then the heat flows from the surroundings into an object.

The _____ is the amount of energy needed to increase the temperature of 1 mol of a substance by 1°C.

Human body usually exhausts the supply of stored carbohydrates before utilizing the fat reserves.

Which of the following can be categorized as potential energy?

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

Which of the following types of coal has high oxygen content and the lowest ΔH_comb?

The amount of energy released by the combustion of 2 moles of benzene is _____kJ. (ΔH^o_comb of benzene = -41.8 kJ/g)

The work done by a person while moving a 15.0 kg sphere at an acceleration of 2.0 m/s² to a store at a distance of 6.0 meters from its original position is _____J.

In the equation q = mC_sΔT, C_s represents _____.