Question

Limitations of first law of thermodynamics in simple and easy to understand words

Answer 1

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.