Question

Limitations of first law of thermodynamics

Answer 1

Limitations of First Law of Thermodynamics. First law does not provide a clear idea about the direction of absorption or evolution of heat. The informations provided by the first law of thermodynamics are not enough to predict the spontaneity or feasibility of a process.

Answer 2

First Law of Thermodynamics explains that energy can neither be created nor destroyed but can be changed to other forms.

The limitations of first law -

It does not tells us about direction in which heat flows when they are in contact

It does not tell about the final temperature of two bodies when they are in direct contact.

It does not tell about the entropy of system.