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Specific Heat
Thermal Energy
Transfer of Energy
Using Thermal Energy
True/False
100
This device is used to measure specific heat.
What is a calorimeter?
100
A measure of the average kinetic energy of the particles that make up the object.
What is temperature?
100
The transfer of thermal energy by collisions between more energetic and less energetic particles.
What is conduction?
100
This states that if the mechanical energy of a system is constant, then the increase in thermal energy of that system equals the work done on the that system plus the thermal energy transferred into that system.
What is the first law of thermodynamics?
100
The transfer of thermal energy by conduction and convection does not require matter.
What is false: does
200
This amount of thermal energy is needed to raise the temperature of 4.0 kg of water from 25 C to 75 C. (The specific heat of water is 4200 J/kg C)
What is 840,000 J.
200
This term means the sum of the kinetic and potential energies of all the particles that make up an object (not the same as the the sum of KE and PE in a system).
What is thermal energy?
200
The transfer of thermal energy by the movement of warmer and cooler materials.
What is convection?
200
This states that energy spontaneously spreads from regions of higher concentration to regions of lower concentration.
What is the second law of thermodynamics?
200
The transfer of thermal energy by radiation does not require matter.
What is true.
300
This is equal to the change in temperature of 33.0 g of graphite when it absorbs 350 J of thermal energy. (The specific heat of graphite is 710 J/kg C)
What is 15 C.
300
The transfer of thermal energy due to a temperature difference.
What is heat.
300
The transfer of energy by electromagnetic waves.
What is radiation?
300
This transforms thermal energy into mechanical energy.
What is a heat engine?
300
Solar collectors are used in passive solar heating systems.
What is false: active
400
This is the specific heat of 3.0 kg of a material whose temperature increases by 5.0 C when 6750 J of thermal energy are added to it.
What is 450 J/kg C
400
The amount of heat needed to raise the temperature of 1 kg of the material by 1 C.
What is specific heat?
400
Objects used to reduce the transfer of thermal energy from one place to another.
What are thermal insulators?
400
Which of the following is a poor thermal insulator? Iron, feathers, air or plastic?
What is iron.
400
Because dark colors reflect more radiant energy than light colors, solar collectors are usually painted black.
What is false - absorb
500
200 g of water in a glass is at 10.0 C when an ice cube is place in the glass. After the water transfers 4,200 J of energy to the ice cube, this is its final temperature.
What is 5.0 C
500
The atoms and molecules that make up matter are in continuous and ______________ motion.
What is random?
500
A beaker of water is heated from the top. Predict which is more likely to occur in the water: thermal energy transfer by conduction or convection.
What is conduction?
500
These machines do work to transfer thermal energy from a cooler region to a warmer region.
What are refrigerators, air conditioners and heat pumps?
500
At the same temperature, 1 kg of water has the same amount of thermal energy as 2 kg of water.
What is false - less