Can one distinguish between the internal energy of a body acquired by het transfer and that acquired by the performance of work on it by an etenal agent ?

Can we decide whether change in internal energy of a system is due to heating or performance of work?

To distinguish between salicylic acid and phenol, one can use:

With the help of one example for each, distinguish between the acquired traits and the inherited traits. Why are the traits/experiences acquired during the entire lifetime of an individual not inherited in the next generation? Explain the reason of this fact with an example.

One can distinguish between HCOOH and CH_3 COOH with :

Give an example where potential energy is acquired by a body due to change of its shape.