Macroscopic Matter

Question 1

ρ=m/V

Answer 1

Connects Mass Density, mass and volume

Question 2

n=N/Na

Answer 2

number of moles = number of atoms/Avogadro constant

Question 3

n=m/M

Answer 3

number of moles = mass / Molar mass

Question 4

pV=nRT

Answer 4

pressure(Pa) x Volume = number moles x R x temperature (K)

Question 5

Ideal gas in sealed container?

Answer 5

nR will be constant so (p(f) x V(f)) / T(f) = (p(i) x V(i)) / T(i)

Question 6

Ideal gas law If you want to talk about N

Answer 6

substitute n=N/Na this changes R p * V=N * kB * T

Question 7

Find distance between atoms?

Answer 7

N / V use ideal gas law

Question 8

STP

Answer 8

T= 0C p= 1atm

Question 9

pV Isochoric process

Answer 9

Same Volume V(f)=V(i)

Verticle Line on pv diagram

Question 10

pV Isobaric process

Answer 10

Same Pressure P(f)=P(i)

Horizontal line on pv diagram

Question 11

If you put a weight on top of sealed container what happens to pressure Pressure?

Answer 11

P(gas)=P(atmos) + (M*g)/A(area) draw diagram

note how it does not depend on temp/type of gas/volume

Question 12

Identify a gas based on measurements of Temp and Volume

Answer 12

Draw graph V vs T know from ideal gas law what gradient represents find n then use n=m/M to find atomic number

Question 13

pV isothermal process

Answer 13

Same Temperature T(f)=T(i)
moves along hyperbolic isotherms
p*V=n*R*T
n*R = constant
T = constant
p(i)*V(i)=p(f)*V(f)

Question 14

Hydrostatic Pressure equation

Answer 14

p=ρ(density)g(gravity)d(depth)