Heat

Monday, 7 May 2018

12:52 PM

Heat is defined as the transfer of energy across the boundary of a system due to a temperature difference between the system and its surroundings.

 

Heat is transferred from the body at the higher temperature to the body at a lower temperature.

 

Units = Joules (J)

 

 

 

 

1 calorie = 4.186 J

(1 food calorie = 1000 calories = 1kcal = 4.186kJ)

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• Energy (in a system) is always conserved
• Any transfer of energy into or out of a system will result in change in the internal energy of the system, .