gases Flashcards
(26 cards)
nitrogen
most abundant gas in the atmosphere, vital for plant growth
oxygen
vital for respiration, made through photosynthesis
methane
greenhouse gas, released into the atmosphere through permafrost
what is chemical reactivity of a gas
its tendency to undergo a chemical change
what does the reactivity of a gas depend on
on the electron configuration and the strength of attraction between the nucleus and the valence electrons
a strong hold on electrons equals…
less reactivity
what is combustion
oxidation reaction that releases energy usually in the form of heat or light
hydrocarbons
organic compunds that come from living organisms, when they burn they will relase water and carbon dioxide
what are the 3 points of the particle model
- all matter in made up of particles, small with space between them
- attract or repel each other
- particles are always moving
vibrational motion
- symmetrical stretching
- bending
- asymmentrical stretching
- in all 3 forms
rotational
liquids and solid
translational
gases
particles in solids
- only motion is vibration
- small atractive force
particles in liquids
- weaker force of attraction
- rotate and vibrate
- distance is greater than a solid
particles in gases
- all 3 types
- no forces between the particles, they spread apart
- they are disorderly
how is someones kinetic energy
determined by mass and velocity
which has a greater effect on kinetic energy
velocity because it is squared
what does the shape of the maxwell distribution curve show
that at any given temperature many of the gas particles move at the same velocity
what happens to the maxwell graph when you increase the temperature
the curve moves to the right
from the peak moving right, what did he infer
the higher the temperature of the gas, the faster the particles move
what are the points of the kinetic molecular theory
- gases consist of molecules in motion
- molecular motion results in collisions with the walls of the container, which results in pressure
- kinetic energy is proportional to the temperature of a gas
- molecular collisions occur with no loss of energy
- have no intermolecular force of attraction or repulsion, therefore mostly empty space
- have negligible volume, volume is mostly empty space
compressibility
gas particles can move close together under the effect of a force
what does compressibility allow
makes it possible to store large quantities of gas in small places
expansion
they will always expand to fill all the available space
