6.2 Kinetic and Potential Energy Flashcards Preview

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Flashcards in 6.2 Kinetic and Potential Energy Deck (12)
1

energy

a property of objects that can be transferred from one object to another, and that cannot be created or destroyed. the capacity to do work

2

what are the two forms of energy?

kinetic and potential

3

kinetic energy

the energy of motion (ex. light-movement of photons, thermal energy-movement of molecules)

4

potential energy

stored energy that is released by a change in an object's structure or position (ex. concentration/electrical gradients)

5

chemical energy

a form of potential energy held in the chemical bonds between pairs of atoms in a molecule

6

covalent bonds form when:

the sharing of electrons between two atoms results in a more stable configuration than if the orbitals of the two atoms did not overlap

7

the more stable configuration will always be the one with lower...

potential energy

8

when a covalent bond is broken, energy is....

required as input

9

when a covalent bond is formed, energy is....

released

10

strong chemical bonds do not contain much chemical energy because:

it is hard to break because the arrangement of orbitals in these molecules is much more stable than the two atoms would be on their own (think ball at bottom of flight of stairs) -does not require lots of energy to remain intact

11

weak covalent bonds have lots of chemical energy because:

the bonds are easily broken because the arrangement of orbitals in these molecules is only somewhat more stable than if the two atoms did not share any electrons -weak bonds require lots of energy to stay intact

12

lots of organic molecules have relatively weak covalent bonds so are rich sources of....

chemical energy and are called fuel molecules