Thermal Energy

Thermal Energy

• The thermal energy was originally assigned the unit calorie. One calorie is the amount of heat required to raise the temperature of 1 gram of water through 1 Degree Celsius.                                                                                                                                                                                              
  

•  If S is the specific heat specific heat of a body body then amount of heat required to raise the temperature of m gm of body through Θ degree celsius is given by;

                        Heat gained = m×SΘ calories

• It has been found experimentally that 1 calorie = 4.186 joules so that heat energy is calories can be expressed in joules as under :

                      Heat gained = (m×SΘ) × 4.186 joules

• The Reader may note that SI may note that SI note that SI unit of heat is also joule In fact the thermal unit calorie is obsolete and unit joule is preferred these days.