Equations To Remember

Question 1

Density equation

Answer 1

D = m/V

Question 2

equation with initial and final mass and volume

Answer 2

M1V1 = M2V2

Question 3

Ideal gas law equation

Answer 3

PV = nRT

Question 4

equation for the amount of heat gained or lost

Answer 4

q = m×s×∆T

M = mass ; s = specific heat ; Delta T = change in temperature

Question 5

gas law having to do with pressure, volume, and temperature in initial and final amount

Answer 5

P1V1/T1 = P2V2/T2

Question 6

q (system) is equal to…

Answer 6

-q (surroundings)

Question 7

gibbs free energy equation

Answer 7

∆G = ∆H + T∆S

∆H = change in enthalpy (heat)
∆S = Change in entropy

∆G = Change in gibs free energy

Question 8

equation for gibbs free energy in relation to temperature

Answer 8

∆G = -RT ln K

Question 9

Equation for gibbs energy using standard cell potential

Answer 9

Δ G = -nFEcell

n = number of moles transfered in the reaction
F = Faradays constant
Ece

Question 10

equation for standard cell potential

Answer 10

Ecell = (.0592/n)log K

Question 11

Delta H equation for a chemical reaction

Answer 11

∆Hº = Σn∆Hºf(products) - Σn∆Hºf (reactants)

Question 12

Delta G equation for a chemical reaction

Answer 12

∆Gº = Σn∆Gºf(products) - Σn∆Gºf (reactants)

Question 13

Delta S equation for a chemical equation

Answer 13

∆Sº = Σn∆Sº(products) - Σn∆Sº (reactants)

Question 14

equation for increase in boiling point

Answer 14

∆Tb = KbCm

Kb = constant
Cm = concentration given

Question 15

equation for freezing point depression

Answer 15

∆Tf = KfCm

Kf = constant
Cm = concentration given

Question 16

What does Kw equal in an entire solution?

Answer 16

[H3O+][OH-] = Kw = 1.0×10-14

Question 17

pH, and pOH equations

Answer 17

pH = -log[H3O+]

pOH = -log[OH-]

Question 18

pH + pOH = ….

Answer 18

14.00

Question 19

pH equation in relation to pKa

Answer 19

pH = pKa + log ([Base]/[Acid])

Question 20

Ka x Kb =

Answer 20

Kw

Question 21

equation for change in energy

Answer 21

ΔE=Δm⋅c^2

Δm = change in mass
c = speed of light

Question 22

equation for rate

Answer 22

Rate=k⋅Nt

k = rate constant
Nt= concentration of the reactant or the number of par

Question 23

Half life of first order equation

Answer 23

t1/2 = ln(2)/k

Question 24

Half life of zero-order equation

Answer 24

t1/2 = [A]0/2k

Question 25

half life in second order equation

Answer 25

t1/2 = 1/k[A]0

Question 26

equation to calculate Fahrenheit from Celsius

Answer 26

F = (9/5 x C) + 32

Question 27

equation to calculate celsius from Fahrenheit

Answer 27

C = 5/9 (F - 32)

Question 28

The root mean square velocity of a molecule or atom equation

Answer 28

U = square root (3RT/Mm) Molar mass must be in kg/mol

Question 29

Energy of a photon equation

Answer 29

E = hc/ lambda E = hv h = planks constant c = speed of sound in a vacuum Lambda = wavelength v = frequency

Question 30

Change in energy (delta E) equation

Answer 30

= - Rh (1/nf^2 - 1/ni^2) Rh = Rydberg’s constant n = energy levels

Question 31

In terms of h, c, and change in energy what is the equation for lambda?

Answer 31

Lambda = hc/|delta E|

Question 32

List all the strong acids

Answer 32

HCLO4 H2SO4 HI HBr HCL HNO3

Question 33

Equation for molecular speed

Answer 33

Square root of (3RT/Mm) Molar mass is in KG/L R= 8.3145

Question 34

Equation for molar mass from ideal gas law

Answer 34

Mm = dRT/P

Question 35

Internal energy equation

Answer 35

Delta U = q + w

Question 36

Equation for work with pressure and volume

Answer 36

W = -p • delta V p = pressure Delta V = change in volume

Question 37

Equation for heat (q) with heat capacity and temperature

Answer 37

q = C • delta T C = heat capacity Delta T = change in temperature

Question 38

Equation to find the vapor pressure, heat of vaporization, or temperature. It’s called the Clausius-clapeyron equation

Answer 38

ln(P2/P1) = (delta H vap/R)(1/T1 - 1/T2) R = 8.3145 j/mol k Delta vap MUST be in j/mol

Question 39

Change in internal energy equation

Answer 39

Delta U = Delta H - P delta V Delta H = change in heat P = pressure Delta V = change in volume

Question 40

Integrated rate law in 0th order

Answer 40

[A]t = -kt + [A]0

Question 41

Integrated rate law in 1st order

Answer 41

ln([A]t/[A]0) = -kt

Question 42

Integrated rate law in 2nd order

Answer 42

1/[A]t = kt + 1/[A]0

Question 43

Half life equation for 0th order

Answer 43

[A]0/2k

Question 44

Half life equation for 1st order

Answer 44

.693/k

Question 45

Half life equation for 2nd order

Answer 45

1/(k[A]0)

Question 46

Solubility and pressure equation

Answer 46

S2/S1 = P2/P1

Question 47

Kp equation in relation to Kc

Answer 47

Kp = Kc (RT)^delta n Delta n = (c+d) - (a+b)