thermal properties of matter

• temp is the measurement of hotness or coldness of a body
• heat si= joules
• heat cgs unit = calories
• flow of energy from high temp to low temp is called heat
• celicous to kelvin= c+273
• c->f c/5=f-32/9
• at -273.15 degree celcious=pressure will be 0 (absolute zero)
• as the for the anomalous property of H2O 0℃-4℃ volume min at 4℃ and density max at 4℃
• important

  A)

  
• amt of heat required to raise the temp of unit mass of sub by 1 degree is called specific heat capacity
• specific heat capacity eq

  
• amt of heat req to rasie the temp of unit mole of a sub by 1 degree is called molar specific heat capacity

  
• water has the most specific heat capcity and is the reason why it is used as a coolants in automobiles refriderator etx
• principle of calorimetry

  when a hot body is put in contact with a cold body ,heat will flow from hot body to cold body imtol both body attain same temperatur

  here the heat lost by the hot body will be equal to heat gained by cold body
• thermometer is used to measure temperature
• calorimeter is an apparatus which can measure the amount of energy transferred between two bodies without any loss or gain of energy
• solid to liquid (melting)
• liq to solid (fusion)
• liq to gas (vaporization)
• gas to liq (condentation)
• solid to gas (sublimation)
• gas to solid (deposition)
• latent heat

  amt of heat req to change state of unit mass of a sub from liq to gas.
• laten heat of fusion

  amt of heat req to change state of unit mass of a sub from solid to liq
• latent heat of vaporization

  amt of heat req to change state of unit mass of a sub from liq to gas
• burns from steam is more serious than heat from burns from boiling water why?

  because of laten heat of vaporization is more
• conduction:transfer of heat by molecullar collisions without actual movement of molecules
• the time rate of heat flow is is directly proportional to the temperature difference area of cross section and inversly proportional to length of conductor is called thermal conductivity.
• convection: heat transfers throught the movement of molecules.

  (SEA BREEZE/LAND BREEZE)

  
• RADIATION: heat transfer without any need for medium to transfer
• imp