Quiz about Unit 9 | Heat, Thermochemistry and Calorimetry Review

Question 1

What is Thermochemistry?

Accepted Answer

The study of heat changes in chemical reactions and physical changes of state.

Answer

The study of energy in motion.

Answer

The study of temperature changes in substances.

Answer

The study of chemical bonds.

Question 2

Define Energy.

Accepted Answer

The capacity to perform work or supply heat.

Answer

The measure of temperature.

Answer

The stored chemical potential.

Answer

The process of heat absorption.

Question 3

What is Heat (q)?

Accepted Answer

A) A form of energy that flows between objects due to a temperature difference.

Answer

B) The measure of kinetic energy.

Answer

C) The energy stored in chemical bonds.

Answer

D) The process of energy conversion.

Question 4

Temperature is a measure of the average ________ energy of the particles within a substance.

Accepted Answer

kinetic

Answer

potential

Answer

thermal

Answer

chemical

Question 5

What is Kinetic Energy?

Accepted Answer

The energy possessed by an object due to its motion.

Answer

The energy stored in chemical bonds.

Answer

The energy released in exothermic processes.

Answer

The energy absorbed in endothermic processes.

Question 6

Define Potential Energy.

Accepted Answer

Stored energy due to position or chemical composition.

Answer

Energy in motion.

Answer

Energy released in chemical reactions.

Answer

Energy absorbed from surroundings.

Question 7

Chemical Potential Energy is stored within the ________ of a substance.

Accepted Answer

chemical bonds

Answer

molecular structure

Answer

atomic nucleus

Answer

electron cloud

Question 8

What is an Exothermic Process?

Accepted Answer

A) A process that releases heat energy into the surroundings.

Answer

B) A process that absorbs heat energy from the surroundings.

Answer

C) A process that stores chemical potential energy.

Answer

D) A process that measures temperature changes.

Question 9

Define Endothermic Process.

Accepted Answer

A process that absorbs heat energy from the surroundings.

Answer

A process that releases heat energy into the surroundings.

Answer

A process that converts energy into motion.

Answer

A process that measures energy changes.

Question 10

The Law of Conservation of Energy states that energy cannot be created or ________.

Accepted Answer

destroyed

Answer

transferred

Answer

converted

Answer

lost

Question 11

What are the Units of Energy in the International System of Units (SI)?

Accepted Answer

All of the above

Answer

Joule (J)

Answer

Calorie (cal)

Answer

Food Calorie (Cal)

Question 12

Define Calorimetry.

Accepted Answer

The experimental technique used for the precise measurement of heat changes.

Answer

The process of energy conversion.

Answer

The study of chemical bonds.

Answer

The measure of temperature changes.

Question 13

What is a Calorimeter?

Accepted Answer

A device designed to measure the amount of heat absorbed or released.

Answer

A device that measures temperature.

Answer

A device that stores chemical potential energy.

Answer

A device that converts energy into motion.

Question 14

Specific Heat (c) is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree ________.

Accepted Answer

Celsius

Answer

Fahrenheit

Answer

Kelvin

Answer

Rankine

Question 15

The difference between the final temperature (Tfinal) and the initial temperature (Tinitial) of a substance during a heat transfer process is:

Accepted Answer

Tfinal - Tinitial

Answer

Tinitial - Tfinal

Answer

Tfinal + Tinitial

Answer

Tinitial * Tfinal

Question 16

A calorie (cal) is a unit of energy that is defined as:

Accepted Answer

The amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius

Answer

The amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius

Answer

The amount of energy needed to raise the temperature of 1 gram of water by 10 degrees Celsius

Answer

The amount of energy needed to raise the temperature of 1 kilogram of water by 10 degrees Celsius

Question 17

A Calorie (Cal) is also known as:

Accepted Answer

Kilocalorie

Answer

Joule

Answer

Watt

Answer

Newton

Question 18

A calorimeter is used for:

Accepted Answer

measuring heat

Answer

measuring temperature

Answer

measuring pressure

Answer

measuring volume

Question 19

The science of measuring heat changes in chemical and physical processes is called:

Accepted Answer

Calorimetry

Answer

Thermodynamics

Answer

Kinetics

Answer

Electrochemistry

Question 20

What is chemical potential energy?

Accepted Answer

A form of energy stored in chemical bonds

Answer

A type of kinetic energy

Answer

Energy due to an object's position

Answer

Energy from nuclear reactions

Question 21

An endothermic process is:

Accepted Answer

a process that absorbs heat

Answer

a process that releases heat

Answer

a process that neither absorbs nor releases heat

Answer

a process that involves a change in state

Question 22

Energy is the ability to do what?

Accepted Answer

Move objects

Answer

Create matter

Answer

Destroy atoms

Answer

Change color

Question 23

An exothermic process is a process that:

Accepted Answer

releases heat to the surroundings

Answer

absorbs heat from the surroundings

Answer

does not involve any heat exchange

Answer

requires heat to proceed

Question 24

What is heat (q)?

Accepted Answer

A form of energy

Answer

A type of matter

Answer

A chemical element

Answer

A physical force

Question 25

The standard unit of energy in the International System of Units (SI) is:

Accepted Answer

Joule

Answer

Watt

Answer

Newton

Answer

Pascal

Question 26

What is kinetic energy?

Accepted Answer

Energy possessed by an object due to its motion

Answer

A type of potential energy

Answer

Energy stored in chemical bonds

Answer

Energy from nuclear reactions

Question 27

The law of conservation of energy states that:

Accepted Answer

Energy can be transformed from one form to another, but cannot be created or destroyed.

Answer

Energy can be created or destroyed.

Answer

Energy is always increasing in the universe.

Answer

Energy is only conserved in closed systems.

Question 28

What is potential energy?

Accepted Answer

A form of energy related to an object's position or state

Answer

A type of energy associated with motion

Answer

Energy that is lost during a process

Answer

Energy that is created from nothing

Question 29

What is specific heat (c)?

Accepted Answer

The amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius.

Answer

The amount of heat required to change the state of a substance without changing its temperature.

Answer

The amount of heat required to raise the temperature of a unit volume of a substance by one degree Celsius.

Answer

The amount of heat required to raise the temperature of a unit mass of a substance by one degree Fahrenheit.

Question 30

Temperature is a measure of:

Accepted Answer

heat energy

Answer

mass

Answer

volume

Answer

density

Question 31

What is thermal equilibrium?

Accepted Answer

A state where two objects in contact have the same temperature and no heat flows between them.

Answer

A state where two objects in contact have different temperatures and heat flows between them.

Answer

A state where two objects are isolated and no heat flows between them.

Answer

A state where two objects have the same mass and volume.

Question 32

Thermochemistry is the study of the _______ associated with chemical reactions.

Accepted Answer

energy changes

Answer

color changes

Answer

phase changes

Answer

pressure changes

Question 33

List three different forms of energy besides heat and provide a brief description of each.

Accepted Answer

Kinetic energy, potential energy, and chemical energy

Answer

Thermal energy, sound energy, and nuclear energy

Answer

Electrical energy, magnetic energy, and gravitational energy

Answer

Light energy, mechanical energy, and elastic energy

Question 34

When heat energy is added to a substance, what happens to the motion of its particles and how does this relate to the temperature of the substance?

Accepted Answer

The motion of particles increases, leading to a rise in temperature.

Answer

The motion of particles decreases, leading to a rise in temperature.

Answer

The motion of particles remains the same, leading to a rise in temperature.

Answer

The motion of particles increases, leading to a decrease in temperature.

Question 35

The reaction is:

Accepted Answer

endothermic

Answer

exothermic

Question 36

State the Law of Conservation of Energy and explain its significance in the context of thermochemical changes.

Accepted Answer

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another. It is significant in thermochemical changes as it ensures that the total energy before and after a reaction remains constant.

Answer

The Law of Conservation of Energy states that energy can be created and destroyed. It is significant in thermochemical changes as it allows for the creation of energy during reactions.

Answer

The Law of Conservation of Energy states that energy is always lost in the form of heat. It is significant in thermochemical changes as it explains the loss of energy during reactions.

Answer

The Law of Conservation of Energy states that energy is only conserved in closed systems. It is significant in thermochemical changes as it applies only to isolated reactions.

Question 37

Convert 500 Joules (J) into chemistry calories (cal). Show your work.

Accepted Answer

119.5 cal

Answer

120 cal

Answer

118.5 cal

Answer

121 cal

Question 38

Calorimetry is the measurement of what in a laboratory setting?

Accepted Answer

Heat transfer

Answer

Temperature changes

Answer

Chemical reactions

Answer

Mass changes

Question 39

Explain the concept of specific heat capacity. What does a high specific heat value for a substance indicate about its temperature change when heat is added?

Accepted Answer

Specific heat capacity is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius. A high specific heat value indicates that the substance will experience a small temperature change when heat is added.

Answer

Specific heat capacity is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius. A high specific heat value indicates that the substance will experience a large temperature change when heat is added.

Answer

Specific heat capacity is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius. A high specific heat value indicates that the substance will not change temperature when heat is added.

Answer

Specific heat capacity is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius. A high specific heat value indicates that the substance will change temperature rapidly when heat is added.

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