test 3

Question 1

ideal gas law

Answer 1

pv=nRt

Question 2

barometer

Answer 2

device used to measure atmospheric pressure

Question 3

manometer

Answer 3

instruments used to measure the pressure of gases other than the atmosphere

Question 4

boyles law states

Answer 4

volume occupied by a gas is inversely proportional to its pressure

Question 5

boyles law equation

Answer 5

p1v1=p2v2

Question 6

boyles law graph

Answer 6

curve down

Question 7

charles law states

Answer 7

volume occupied by a gas is directly proportional to its Kelvin temp

Question 8

charles law equation

Answer 8

v1/t1=v2/t2

Question 9

charles law graph

Answer 9

box cut in half, up to right

Question 10

Avogadro’s law states

Answer 10

volume of a gas is directly porportinal to its amt in moles

Question 11

avogadros law equation

Answer 11

V1/n1=v2/n2

Question 12

avogadros law graph

Answer 12

similiar to charles

Question 13

Amonton’s law states

Answer 13

pressure of a gas is directly proportional to its kelvin temp

Question 14

Amonton’s law equation

Answer 14

P1/T1=P2/T2

Question 15

amonton’s law graph

Answer 15

similar to charles and avogadros

Question 16

Stp stands for

Answer 16

273.15 K and exactly 1 atm

Question 17

ideal gas mixture

Answer 17

each gas acts independently of all the others, and each gas obeys the ideal gas law

Question 18

Daltons law of partial pressures

Answer 18

the total pressure of a gas mixture is equal to the sum of partial pressures of the individual gases in the mixtures

Question 19

partial pressure

Answer 19

the pressure which that gas, independent of any other gas in the mixture, exerts on the walls of the container

Question 20

pressure fracture for X gas

Answer 20

Px / P total

Question 21

pressure fraction of a gas in a gas mixture is equal..

Answer 21

to its mole fraction in the mixture.

Px / P total = N x / N total

Question 22

mole fraction

Answer 22

Px / P total = X x or P x = (X x) x (P total)

Question 23

root means squared equation

Answer 23

((3RT)/ MM)^1/2

Question 24

maximum of a curve determines

Answer 24

most probable speed

Question 25

as temp increases, the most probable speed

Answer 25

increases

Question 26

as temp increases, the curves

Answer 26

flatten out

Question 27

as temp increases, fractions of molecules traveling at various speeds is tending to

Answer 27

equalize

Question 28

lighter molecules have

Answer 28

a higher most probable speed

Question 29

T/F: in a population of light molecules, the fractions of molecules traveling at various speeds tends to be more equal than for heavy molecules

Answer 29

true

Question 30

what conditions is the ideal gas law most likely obeyed?

Answer 30

w high temps and low pressures

Question 31

molarity

Answer 31

mols of solute / L of solution

Question 32

the dilution equation

Answer 32

C1V1=C2V2

Question 33

system

Answer 33

substances involved in the chemical reaction, the products and reactants

Question 34

surroundings

Answer 34

everything with which the system can exchange energy

Question 35

thermal energy

Answer 35

the energy associated with the random motions of atoms and molecules

Question 36

temperature

Answer 36

an indication of the amt of thermal energy associated w a sample of matter

Question 37

exothermic reactions

Answer 37

produces heat which flows into the surroundings

Question 38

endothermic reactions

Answer 38

take in heat from the surroundings

Question 39

specific heat

Answer 39

the amt of heat required to raise the temp of exactly one gram of the substance by one whole degree C

Question 40

heat capacity

Answer 40

heat required to raise the temp of the sample by 1 degree C

Question 41

2 ways to find heat:

Answer 41

heat = (heat capacity) x (change in temp)
heat = (mass) x (specific heat) x (change in temp)

Question 42

whatever heat is gain or lost by the system will be gained or lost by the surroundings. equation:

Answer 42

heat (sys) + heat (surr) = 0

Question 43

enthalpy equation

Answer 43

Delta H = H (products) - H (reactants)

Question 44

delta H of reaction:

Answer 44

(product mol x delta Hf sums) - (reactant mol x delta Hf sums)

Question 45

when does the formation of a reaction occur?

Answer 45

when one mole of a substance is formed from its constituents elements in their most stable form

Question 46

delta H reaction equation using bonds

Answer 46

(+)sum of energy of bonds broken + sum of energy of bonds made(-)