Temperature is a measure of the...

average kinetic energy of molecules in a substance

total kinetic energy in a substance

average potential energy in a substance

When thermal energy is added to a substance, the substance's particles move:

More rapidly with less distance between each other.

More rapidly at an increased distance from each other.

More slowly with a greater distance between each other.

More slowly with a reduced distance between each other.

Heat transfer by conduction occurs when...

atoms give off heat in the form of electromagnetic waves

large numbers of atoms move from place to place

electromagnetic waves travel from place to place through a vacuum

Heat transfer by convection occurs when...

large numbers of atoms move from place to place

electrons bump into other electrons

atoms give off heat in the form of electromagnetic waves

electromagnetic waves travel from place to place through a vacuum

A substance with a high specific heat:

Requires a lot of energy to become hot.

Does not requires a lot of energy to become hot.

Thermal energy always moves:

From a high temperature object to a lower temperature object.

From an object with lower kinetic energy to an object with higher kinetic energy.

From a lower temperature object to a higher temperature object.

From an object of higher mass to an object of lower mass.

The temperature of a glass of cold water will eventually...

Match the temperature of the surrounding environment.

Become warmer than the surrounding environment.

Always be colder than the surrounding environment.

Sam placed a glass of water in the refrigerator. After about an hour he took it out and found it to be colder. What is the most likely thing that happened?

the heat that was in the water transferred out into the refrigerator

the cold that was in the refrigerator transferred into the water

the cold from the refrigerator radiated into the glass

the particles in the water started to move faster

If you put a glass of water in the freezer, why did the water freeze?

The heat moved from the glass of water to the freezer.

The cold radiation from the freezer made the water colder.

The cold from the freezer flowed into the glass of water.

The cold particles touched the glass and transferred cold to the water.

You probably use the term heat many times a day. As an example, when you cook dinner, you heat your dinner on a hot stove. When you place a piece of cool metal in the sun, it is heated by the sun’s energy. Why is heat the correct term to use in these examples?

They show that heat flows from something warmer to something cooler.

They show that when objects are touching, they are the same temperature.

They indicate that heat is created to raise the termperature of something.

They indicate that the kinetic energy of the particles decreases when something is heated.

A student likes to attend football games, no matter how cold and snowy the weather becomes. She is going to a game on a very cold day and takes along a hand warmer. She activates it and tucks it into the glove she is wearing. She holds her hands together, and before long, her hands are warm. Which best describes how her hands were warmed?

Heat was transferred by conduction, resulting in an increase in kinetic energy.

Thermal energy was transferred by currents, resulting in an increase in kinetic energy.

Heat was transformed by convection, resulting in the conservation of energy.

Heat was transformed by radiation, resulting in an increase in kinetic energy.

A student gets ready to go to school one day, and he finds out that his car's battery is dead. The headlights will not come on, and the car won’t start. What transformations usually happen when the battery is active and the headlights come on?

chemical → electrical → light

light → electrical → chemical

electrical → kinetic → light

thermal → electrical → light

A new home had a wooden floor put down in cool weather. As the weather became warmer, the floor started to buckle, rising up in the middle of the floor. The floor was fixed by trimming the edges of the floor so that there was a space between the flooring and the wall. Choose the response that best explains why this helped to make the floor flat again.

The particles in the floor increase in thermal energy in warm weather, increasing the kinetic energy of its particles and making it expand. Trimming it gave it room to expand.

The particles in the floor decrease in thermal energy in warm weather, decreasing the kinetic energy of its particles and making it expand. Trimming it gave it room to expand.

The particles in the floor decrease in thermal energy in warm weather, decreasing the kinetic energy of its particles and making it contract. Trimming it gave it room to contract.

The particles in the floor increase in thermal energy in warm weather, increasing the kinetic energy of its particles and making it contract. Trimming it gave it room to contract.

When heating a solution, a scientist detects a temperature increase in the solution during a period of time. Which of the following statements accurately characterizes the solution during this period?

The velocity of molecules in the solution is increasing.

The solution is at boiling point.

The solution is undergoing a phase change.

The solution’s temperature increase is proportional to its ΔH_{vaporization}

Equal amounts of heat are absorbed by 100 g samples of various solid metals with differing specific heat values. Which of the following statements is true regarding metals and their specific heat values?

The metal with the greatest specific heat will undergo the smallest change in temperature.

The metal with the smallest specific heat will undergo the smallest change in temperature.

The metal with the smallest specific heat will resist melting to a greater degree at its melting point.

The metal with the greatest specific heat will resist melting to a greater degree at its melting point.

Atmospheric gases absorb more energy than they emit. If we consider a gas to be a closed system, which of the following is true?

The heat absorbed by the gas is positive.

The internal energy of the gas increases

The change in volume of the gas is negative

The work done on the gas is equal to the change in internal energy and the heat absorbed by the gas

Do molecules generally move faster at 45 C or 106 C?

106 C because molecules have more energy than in 45C

45 C because molecules have more energy than in 106C

106 C because molecules have less energy than in 45C

45C because molecules have less energy than in 106 C

When you place the metal in boiling water, heat flows from the _________ to the _______.

bottom of the metal to the top half of the metal

bottom of the water to the top of the water

E157 (PRELIM) THERMODYNAMICS

Authored by Vener Castañaga

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

The study of heat energy that is involved in chemical and physical changes is

efficiency

thermodynamics

equilibrium

calorimetry

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Chemical reactions that absorb heat energy are called and have a enthalpy.

exothermic, positive

exothermic, negative

endothermic, positive

not identified

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Whether a chemical reaction or physical change takes place depends on both the enthalpy and the __________ of the process.

entropy

equilibrium

energy

all of these

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Both the enthalpy and the entropy are combined to calculate the

reaction time

free energy

bound energy

none of these

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The free energy term provides information regarding the __________ of a chemical reaction.

spontaneity

luminosity

reactivity

all of these

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Thermodynamics give chemists an idea of which direction the minimum __________ of a given reaction lies.

reaction time

reaction volume

potential energy

none of these

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A(n) _____________ is a device for measuring temperature.

thermometer

psychrometer

anemometer

barometer

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E157 (PRELIM) THERMODYNAMICS

The study of heat energy that is involved in chemical and physical changes is

Chemical reactions that absorb heat energy are called and have a enthalpy.

Whether a chemical reaction or physical change takes place depends on both the enthalpy and the __________ of the process.

Both the enthalpy and the entropy are combined to calculate the

The free energy term provides information regarding the __________ of a chemical reaction.

Thermodynamics give chemists an idea of which direction the minimum __________ of a given reaction lies.

A(n) _____________ is a device for measuring temperature.

Temperature is a measure of the...

A slower particle has a lower energy than an identical, faster particle.

The transfer of thermal energy between objects of different temperatures is called...

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

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E157 (PRELIM) THERMODYNAMICS

The study of heat energy that is involved in chemical and physical changes is

Chemical reactions that absorb heat energy are called __________ and have a __________ enthalpy.

Whether a chemical reaction or physical change takes place depends on both the enthalpy and the __________ of the process.

Both the enthalpy and the entropy are combined to calculate the

The free energy term provides information regarding the __________ of a chemical reaction.

Thermodynamics give chemists an idea of which direction the minimum __________ of a given reaction lies.

A(n) _____________ is a device for measuring temperature.

Temperature is a measure of the...

A slower particle has a lower energy than an identical, faster particle.

The transfer of thermal energy between objects of different temperatures is called...

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Education

Chemical reactions that absorb heat energy are called and have a enthalpy.