gases

Question 1

nitrogen

Answer 1

most abundant gas in the atmosphere, vital for plant growth

Question 2

oxygen

Answer 2

vital for respiration, made through photosynthesis

Question 3

methane

Answer 3

greenhouse gas, released into the atmosphere through permafrost

Question 4

what is chemical reactivity of a gas

Answer 4

its tendency to undergo a chemical change

Question 5

what does the reactivity of a gas depend on

Answer 5

on the electron configuration and the strength of attraction between the nucleus and the valence electrons

Question 6

a strong hold on electrons equals…

Answer 6

less reactivity

Question 7

what is combustion

Answer 7

oxidation reaction that releases energy usually in the form of heat or light

Question 8

hydrocarbons

Answer 8

organic compunds that come from living organisms, when they burn they will relase water and carbon dioxide

Question 9

what are the 3 points of the particle model

Answer 9

• all matter in made up of particles, small with space between them
• attract or repel each other
• particles are always moving

Question 10

vibrational motion

Answer 10

• symmetrical stretching
• bending
• asymmentrical stretching
• in all 3 forms

Question 11

rotational

Answer 11

liquids and solid

Question 12

translational

Answer 12

gases

Question 13

particles in solids

Answer 13

• only motion is vibration

- small atractive force

Question 14

particles in liquids

Answer 14

• weaker force of attraction
• rotate and vibrate
• distance is greater than a solid

Question 15

particles in gases

Answer 15

• all 3 types
• no forces between the particles, they spread apart
• they are disorderly

Question 16

how is someones kinetic energy

Answer 16

determined by mass and velocity

Question 17

which has a greater effect on kinetic energy

Answer 17

velocity because it is squared

Question 18

what does the shape of the maxwell distribution curve show

Answer 18

that at any given temperature many of the gas particles move at the same velocity

Question 19

what happens to the maxwell graph when you increase the temperature

Answer 19

the curve moves to the right

Question 20

from the peak moving right, what did he infer

Answer 20

the higher the temperature of the gas, the faster the particles move

Question 21

what are the points of the kinetic molecular theory

Answer 21

• 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

Question 22

compressibility

Answer 22

gas particles can move close together under the effect of a force

Question 23

what does compressibility allow

Answer 23

makes it possible to store large quantities of gas in small places

Question 24

expansion

Answer 24

they will always expand to fill all the available space

Question 25

diffusion

Answer 25

• random dispersion of aimlessly colliding particles

- gas mixed with other gases through the movement of its particles

Question 26

effusion

Answer 26

• gas flows across a barrier through a small opening