Question

Define first law of thermodynamics in chemistry

Answer 1

Since the First Law of Thermodynamics states that energy is not created nor destroyed we know that anything lost by the surroundings is gained by the system. ... Therefore, q and w are positive in the equation ΔU=q+w because the system gains heat and gets work done on itself.

Answer 2

Explanation:

First law of Thermodynamics :- ---------------

→ According to this La energy can neither be created nor be destroyed. So you in any physical or chemical process Total energy of universe is constant .

°•° ∆U = q + W.