Another word for "thermal energy" is ________________
Heat energy
Solar energy
Electrical energy
Light energy
A calorimeter is designed to:
Measure heat exchange
Speed reactions
Stop chemical reactions
Increase entropy
A campfire producing heat and light shows that:
Heat cannot be produced naturally
Energy can change forms
Energy disappears
Matter becomes energy only
Entropy is best described as:
Disorder or randomness
Reaction speed
Energy storage
Particle mass
An exothermic reaction:
Absorbs heat
Stops energy transfer
Releases heat
Requires no energy
What is thermochemistry the study of?
Motion of objects
Atomic size trends
Electron orbitals
Energy changes during chemical reactions
Which type of energy is stored energy?
Mechanical energy
Kinetic energy
Potential energy
Thermal energy
Which will most likely occur when raw egg is placed on black pavement on a hot, summer day?
The egg will absorb the heat and leave the pavement hotter
The egg will reflect the heat and make the pavement hotter.
The pavement will conduct the heat and cook the egg.
The pavement will absorb the heat from the egg.
Which describes what can happen as a result of radiation?
A piece of wood burns in a fire.
A car’s inside temperature rises to over 100 degrees.
A shirt is hot after having been ironed.
A can of soup is heated in a pot on a stove.
The heat from a lamp allows a lizard to remain warm. This is an example of which type of heat transfer?
convection
radiation
insulation
conduction
_________ is the ability to do work
Power
Strength
Force
Energy
According to conservation of energy, energy can only:
Be transferred or converted
Be destroyed
Disappear
Be created
Warm air is __________ dense than cold air and rises creating convection currents.
less
more
The amount of energy required to raise the temperature 1ºC is called____?
Temperature
Thermal Energy
Heat Capacity
Specific Heat
Potential energy diagrams show:
Mass changes during reactions
Temperature of atoms
Energy changes during reactions
Reaction color
Heat transfer continues until:
Pressure increases
Objects melt
Energy disappears
Objects reach the same temperature
Heat is best defined as:
Energy stored in bonds
Motion of electrons
Stored energy inside atoms
Energy transferred because of temperature differences
The amount of energy required to raise the temperature 1ºC for every gram is called____?
Kinetic Energy
Thermal Energy
Specific Heat
Temperature
How is heat transferred when boiling a pot of water on the stove?
conduction
combustion
radiation
convection
An endothermic reaction:
Produces light only
Absorbs heat
Destroys energy
Releases heat
When new chemical bonds form, energy is typically:
Lost permanently
Released
Absorbed
Destroyed
Which situation demonstrates energy conversion?
A frozen lake
A lamp turning electricity into light
Water boiling
A rock sitting on the ground
What term is given to a reaction which transfers heat energy to the surroundings?
Exothermic
Endothermic
Reversible
Reversible
The activation energy is:
Energy required to start a reaction
Energy released by bonds
Energy lost as heat
Total energy in products
How does heat flow?
Always from warm to cold
Both warm to cold & cold to warm
Always from cold to warm
It depends on the temperature
What would be the effect on the particles if more heat is supplied to the system?
There would be no effect
They would stop moving
They would slow down
They would speed up
Which state of matter typically has highest entropy?
Gas
Liquid
Solid
Plasma
Energy can be defined as:
The ability to increase mass
The ability to stop reactions
The ability to create matter
The ability to supply heat or do work
When a chemical bond breaks, energy is:
Released
Absorbed
Converted to mass
Destroyed
Which is energy in motion?
Kinetic energy
Potential energy
The First Law of Thermodynamics states:
Energy disappears over time
Energy can only be chemical
Energy cannot be created or destroyed
Energy only becomes heat