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Flashcards in Thermal Deck (21):
1

Avogadro constant

Number of atoms in 12g of carbon 12

2

One atomic mass unit

1/12 the mass of a C 12 atom

3

Mole

One mole is the quantity of a substance that contains NA particles

4

Molarity

Number of moles in a given quantity of a substance

5

Molar mass

The mass of 1 mol of substance

kgmol^-1

6

Number of moles in mass Ms of a substance

Ms/M

7

Number of molecules in mass Ms of substance

NAMs/M

8

Charles law

V/T constant

9

Pressure law

P/T constant

10

Boyles law

PV constant

11

Ideal gas?

Obeys boyles law

12

Ideal gas equation:

pV = nRT

13

Density of ideal gas

Mass/Volume

nM/V

pM/RT

14

pV=

NkT

15

Kinetic theory equation assumptions

1) Brownian motion
2) elastic
3) molecules don’t attract
4) collision time shorter than moving time
5) molecules are point molecules

16

1st law of thermodynamics

The change of internal energy of an object = the total energy transfer due to work done and heating

17

Internal energy

Sum of the random distribution of KE and PE of its molecules

18

Latent Heat of Fusion

Energy needed to melt a solid at its melting point

19

Latent Heat of vaporisation

Energy needed to vaporise a liquid

20

Specific latent Heat of fusion

Energy needed to change state of unit mass from solid to liquid without temperature change

21

Specific latent Heat of vaporisation

Energy needed to change the state of unit mass of substance from liquid to vapour without a change in temperature