HEAT STRUCTURE OF ATOM Important Topics

Few important questions

Heat

1. Units

Heat SI unit- Joule  CGS unit - Calorie

1 Calorie= 4.186 or 4.2 Joules

Temperature SI unit Kelvin CGS unit  °C

0°C= 273K

Specific Heat 

SI unit J/ kg-K 

CGS unit Cal/g -°C

2. Definitions of 

Heat : it is a form of energy. It flows from from hot body to cold body.

Temperature : Degree of hotness or coldness

Specific Heat: The amount of heat required to rise the temperature of unit mass of a substance by one unit.

Thermal equilibrium 

evaporation 

condensation 

dew 

humidity 

fog 

boiling 

melting 

freezing 

latent heat of fusion 

and

Latent heat of vaporization

3. Formulas 

Q=mS∆t 

S=Q/m∆t

L=Q/m 

T=T1+T2/2

T=M1T1+M2T2/2

Latent heat of fusion of Ice 80 cal/g 

Latent heat of vaporization of water 540 cal/g

Structure of Atom

Spectrum 

Electromagnetic spectrum

Speed of light 3 x 10 power 8 m/s 

Wave equation

Max planck wave equation

Plancks constant

Its value 

Quantum numbers and it's proposers names 

Shapes of orbitals

s- Spherical

 p- Dumbbell

d- Double Dumbbell

Maximum number of electrons in shell 2n2

Sub-shell 2(2l+1)

Principal quantum number- Neil's Bohr 

Angular Momentum Quantum number- Sommerfeld 

Magnetic Quantum number- Lande 

Spin Quantum number- Ulhenbeck & Goudsmith 

Paulis exclusion principle

Aufbau principle 

Hunds rule

Moellar Chart

Moellar chart