Energy

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?

318.1j

According to the law of conservation of energy, what will most likely happen in a closed system?

Energy will be exchanged, but matter will not be exchanged.

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?

It involves both energy transformation and energy transfer.

Which statement describes thermal energy?

Which statement describes thermal energy?

What best identifies the energy transformation that occurs in the flashbulb?

chemical energy to electromagnetic energy and thermal energy

Which statement is correct about the law of conservation of energy?

energy is transformed when atoms rearrange

Which is the best example of potential energy?

holding a basketball in the air

Which is the best term to use when describing the energy of motion?

kinetic

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?

law of conservation

Which is the best term to use when describing the energy of position?

potential

Which energy change best relates to a boulder that is rolling down the side of a hill?

potential energy transforming into kinetic energy

Thermal energy is the energy associated with

temperature