Laws of thermodynamics

Zeroth law of thermodynamics 

When two bodies are each in thermal equilibrium with a

third body then the two bodies are also

in thermal equilibrium with an other

First law of thermodynamics the first law of thermodynamics is stated as that

mechanical work are mutually convertible

the energy can neither be created nor be destroyed

but it can transform from one  body to another body

Q   = w + u 

Q= heat transferred   u= change in internal energy      w= work done

 

Second law of thermodynamics second law of thermodynamics is situated as it is impossible to construct an engine working

on a cycle process whose also purpose is to convert heat into equivalent amount of work

it is impossible for a self acting machine working on a cyclic process  

To transfer heat from a body to a lower temperature to a body at Higher temperature

without the aid of an external source 

Law of conservation of energy 

The energy can neither be created nor be destroyed through it can be transferred

from one form to another this means the total energy  possessed by a body remains constant

Law of conservation of matter this last states that matter is not created nor destroyed in any chemical or physical change

however this love does not apply to nuclear reaction because some matter is turned into energy

Heat energy

Heat energy is a form of energy transfer among  particles in a substance

by means of kinetic energy of those particles in the world under kinetic

theory the heat is transferred by particles bouncing into each other

Methods of heat transfer there is different methods to transfer heat from

one body to another body

1. Conduction
2. Conduction
3. Radiation 

Conduction

conduction is a heat flow through solid without any visible moment

it is due to temperature difference

heat flows from high temperature region to low temperature region 

Convection

is a process by which heat transmitted from one place to another by the movement of

heated particles of a gas or liquid.

Radiation

radiation is a method of heat transfer does not require any medium it can take place in a

vacuum in radiation heat transmits energy e in the form of waves.