Direction of work and heat interaction

Replies

• 

  Ramani Aswath

  Second law of thermodynamics operates in all situations.
  All work done ultimately degenerates into heat and warms up the device, be it key board, monitor, CPU or all together.
  The total heat output will be exactly equal to the total power input to the system from the grid and the mechanical energy of the fingers pressing the keys.
• 

  zaveri

  Mostly the heat actually flows in one direction, that is through the walls of the monitor and CPU casings. and it generally flows from inside to outside, due to the working and heating of the internal circuitry.