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A Level Physics Anix > Thermal Physics > Flashcards

Thermal Physics Flashcards

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1
Q

What is the definition of pressure?
What is the unit for volume and the key equation?

A

The force exerted per unit area
Pascals/Pa and F/A = P

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2
Q

What is the definition of volume? What are the units and key equations?

A

Amount of space occupied by an object
m^3 and basexheightxlength

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3
Q

What is the definition of specific heat capacity?

A

Energy required to increase the temperature of a 1kg object by 1 degree celsius or 1K

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4
Q

What is the equation for specific heat capacity?

A

c=Q/mxchangeintemp
Unit = J/kg degreecelsius

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5
Q

What is the specific latent heat of fusion?

A

Energy required to change the state from solid to liquid without changing the temperature

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6
Q

What is the specific latent heat of evaporation?

A

Energy required to change the state from liquid to gas without changing the temperature

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7
Q

What is the equation for specific latent heat? and the units?

A

L=E/m
J/kg

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8
Q

What is the kinetic theory of gases?

A

Models the thermodynamic behaviour of gases. The theory is based on a set of assumptions

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9
Q

What is meant by thermal equilibrium?

A

When 2 substances no longer exchange any heat energy and both have reached the same temperature

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10
Q

What is meant by internal energy?

A

Sum of the randomly distributed KE and PE of atoms or molecules within a substance

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11
Q

What is the brownian motion?

A

Small particles suspended in a liquid or gas are observed to move around in a constant random motion

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12
Q

What is Boyle’s law?

A

Pressure is inversely proportional to volume

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13
Q

What is Charles’ law

A

Volume is directly proportional to temperature

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14
Q

What is the pressure law?

A

Pressure is directly proportional to temperature

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15
Q

What are the ideal gas characteristics?

A

Negligible volume
Elastic collisions
Cannot be liquified
Has no interactions between the molecules
Obeys the ideal gas laws

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16
Q

What is the first ideal gas equation?

A

PV=nRT

17
Q

What is the second ideal gas equation?

A

PV=NKT

18
Q

What are the assumptions associated with an ideal gas when applying kinetic theory?

A

Molecules of a gas are identical
Molecules are hard, elastic spheres
Volume of a particle is negligible when compared to volume of the container
Time of a collision between two particles is negligible when compared to time between collisions
There are no intermolecular forces between the molecules except during impact
Molecules move in a continuous, random motion
Collisions are elastic

A Level Physics Anix (17 decks)

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