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Physics > Section 2 - Thermal Physics > Flashcards

Section 2 - Thermal Physics Flashcards

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1
Q

What is internal energy

A

The sum of the randomly distributed kinetic and potential energies of all its particles

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2
Q

What is a closed system

A

No net energy transfer

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3
Q

What changes in a change of state?

A

No change in temperature but a change of internal energy.

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4
Q

What is specific heat capacity

A

How much energy it takes to heat 1kg of a substance by 1K

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5
Q

Change of energy equation

A 
Q = mcΔθ
Q = ml
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6
Q

What is specific heat capacity

A

Energy needed to change state

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7
Q

What is specific latent heat

A

This can be of fusion or vaporisation. It is the amount of thermal energy to change the state of 1kg of a substance

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8
Q

Boyle’s Law

A

pv = constant

At a constant temperature the pressure and volume of a gas are inversely proportional.

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9
Q

Charles’s Law

A

V/T = constant

At a constant pressure the volume of a gas is directly proportional to its absolute temperature

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10
Q

Pressure Law

A

p/T = constant

At a constant volume the pressure of a gas is directly proportional to its absolute temperature

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11
Q

What is molar mass

A

The mass of one mole of a gas

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12
Q

What is the ideal gas equation

A

pV = nRT

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13
Q

What is the value of the Boltzmann constant

A

k = 1.38 x10 ^-23 JK-1

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14
Q

What is the Boltzmann constant equation

A

k= R/Na

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15
Q

What is the equation of state for an ideal gas

A

pV = NkT

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16
Q

What is the equation for work done to change the volume of a gas at a constant pressure

A

W = pΔV

17
Q

What is the root mean square speed

A

The average of the square speeds of all the particles

18
Q

What is the equation using Crms

A

pV = 1/3 (NmCrms^2)

19
Q

What are the assumptions for kinetic theory

A

All molecules move randomly
Motion follows Newton’s laws
Collisions are perfectly elastic
Molecules always move in straight lines

20
Q

What is the molar gas constant

A

8.31 J mol-1 K-1

21
Q

What is Avagadros constant

A

6.02 x10 ^23 particles per mole

Physics (5 decks)

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