chem ch 12
the force that will increase the speed of a 1 kg mass by 1 m per second each second that the force is applied
Newton (N)
A unit of pressure equal to a force of 1 N on an area of 1 m^2
Pascal (Pa)
What does STP stand for?
standard temperature and pressure
what is the standard atmosphere for stp
1
The kinetic-molecular theory states that particles of matter are in constant rapid, random motion. The average kinetic energy of random motion is _____ to temperature in kelvins. This means that heat ______ the energy of random motion of a gas.
Proportional, increases
Standard conditions for a gas at 0°C and 1 atm
Standard temperature and pressure (STP)
what is the standard kpa for stp
101.325
what is the regular kelvin temp for stp
273
what is the standard mmhg for stp
760
Although gases ______ dense, they ____ have mass, therefore in a gravitational field they also ____ weight. As gas particles are attracted by earth's gravity, they collide with each other and with earth's surface, creating _________. Pressure is the amount of force exerted per unit area of ____.
Are not, do, have, air pressure, surface
Air is ______ as you move closer to earth's surface because the weight of atmospheric gases at any elevation compresses the gases below them. At high altitudes, less dense air exerts _____ pressure.
Denser, less
According to the kinetic-molecular theory, gas particles travel relatively _____ distances before colliding with each other. These collisions with each other and the walls of their container result in _____. These collisions are perfectly elastic; energy is _____ trsferred from one particle to another
Long, pressure, completely
At sea level, the pressure necessary to maintain a mercury column in a barometer at a height of 760 mm
One standard atmosphere (atm)
What instrument is used to measure air pressure?
barometer
gases are considered _____ because their particles ____ move past each other easily and are thus able to flow. gas particles can be forced closer together by applying pressure to them, thus ____ their volume
fluids, can, decreasing
gases have unique properties because the distance between gas particles is much _____ than the particles of a liquid or solid. in contrast to liquids and solids, gases ____ fill their containers
greater than, completely
Gases have much ____ densities than liquids and solids. because of the ____ distance between gas particles, much of the space occupied by a gas is _____
lower, large, empty
force exerted per unit area
pressure