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