Solids, Liquids, Gases Flashcards

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1
Q

Equation: density =

A

density = mass/volume

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2
Q

Equation: Pressure =

A

pressure = force/area in Pascals or N/m2

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3
Q

Equation: Pressure in a liquid =

A

pressure in a liquid = depth x density x gravity
p = hpg

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4
Q

Pressure at any point in a liquid or a gas acts …..

A

equally in all directions

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5
Q

Pressure in a gas is caused by ….

A

particles in the gas colliding with the sides of a container or an object in the gas

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6
Q

Describe how to find the density of a regular object

A

with a ruler measure width, depth, height
volume = wxdxh
with a mass balance measure mass
density = m/V

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7
Q

Desribe how to find the denity of an irregular object

A

using a dsiplacement can
overfill can and leave on flat surface to drain excess water.
carefully lower object into can until emmersed and catch displaced water in measuring cyclinder
volume of water = volume of object
with a mass balance measure mass of object

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8
Q

Equation for specific heat capacity: Q =

A

Q = mc /\ T

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9
Q

Define specific heat capacity c

A

SHC is the energy required to increase the temperature of 1kg of substance by 1 degree

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10
Q

Describe the arrangement and motion of particles in a solid

A

regular arrangement
closely packed
vibrate in fixed positions
strong forces

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11
Q

Describe the arrangement and motion of particles in a liquid

A

irregular arrangment
closely packed
particles can move past each other
forces less strong than solids

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12
Q

Describe the arrangement and motion of particles in a gas

A

free fast random motion
far apart
weak forces

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13
Q

Describe the motion of molecules in a gas and why they exert a pressure

A

Particles have random motion
They exert a force on the walls of a container and hence a pressure

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14
Q

What is Absolute zero temperature in Kelvin and degrees C?

A

0K
-273 oC

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15
Q

To convert degrees C to Kelvin ……

A

add 273
0 deg C = 273K

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16
Q

To convert Kelvin to degrees C ….

A

subtract 273

17
Q

What does increasing temp do to the average KE of molecules?

A

Average KE is directly proportional to temp
So hotter gases have faster moving molecules

18
Q

Equation linking pressure and volume for fixed mass and temp

A

p1V1 = p2V2

19
Q

Equation linking pressure and for fixed mass and temp in Kelvin

A

p1/T1 = p2/ T2

must have temp in Kelvin