Energy – Flashcards

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question
Which is the best term to use when describing the energy of position?
answer
potential
question
Which is the best example of potential energy?
answer
holding a basketball in the air
question
Which is the best term to use when describing the energy of motion?
answer
kinetic
question
In a chemical reaction occurring in an open beaker, the reactants have a mass of 10.0 g and contain 1000 J of energy. The products in the beaker contain a mass of 5.0 g and 500 J of energy. Which best explains the difference in energy and mass as reactants are converted to products?
answer
law of conservation
question
Thermal energy is the energy associated with
answer
temperature
question
Which statement is correct about the law of conservation of energy?
answer
energy is transformed when atoms rearrange
question
What best identifies the energy transformation that occurs in the flashbulb?
answer
chemical energy to electromagnetic energy and thermal energy
question
According to the law of conservation of energy, what will most likely happen in a closed system?
answer
Energy will be exchanged, but matter will not be exchanged.
question
Which energy change best relates to a boulder that is rolling down the side of a hill?
answer
potential energy transforming into kinetic energy
question
Chemical energy in burning wood is changed into thermal energy. The thermal energy is absorbed by water, which boils to produce steam. The thermal energy is changed into kinetic energy in the moving steam. The kinetic energy is used to turn a turbine, which converts the kinetic energy into electricity. Which sentence best describes this system?
answer
It involves both energy transformation and energy transfer.
question
Which statement describes thermal energy?
answer
Which statement describes thermal energy?
question
Reactant X contains 199.3 J of chemical energy. Reactant Y contains 272.3 J of chemical energy. Product W contains 41.9 J of chemical energy. If the reaction loses 111.6 J of chemical energy as it proceeds, how much chemical energy must product Z contain?
answer
318.1j
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