The law of thermodynamics arising from conversion of heat energy into work.

Laws of Thermodynamics

The first law of thermodynamics confirms the law of

First law of thermodynamics is the general law of conservation of energy as applied to heat energy. According to this law, whenever heat is added to a system, it transforms to an equal amount of some other forms of energy. If dQ= a small amount of heat supplied to the system, dW= small amount of work done by the system and dU= small change in internal energy of the system, then dQ=dU+dW . Read the above passage and answer the following questions: (i) The amount of heat obsorbed by a gas is 10 cals and work done on the gas in 58J . Calculate increase in internal energy of the gas. (ii) What values of life do you learn fron this law?

A : Efficiency of heat engine can neve be 100%. R : Second law of thermodynamics puts a limitaion of the efficiency of a heat engine.

A sink, that is a system where heat is rejected, is essential for the conversion of heat into work. From which law the above inference follows?

The law regarding the conversion of mass into energy was given by

The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is

The first law of thermodynamics incorporates are concept (i) conservation of energy (ii) convervation of heat (iii) conservation of work (iv) equivalence of heat and work