Question

State 1st law of thermodynamics and write its mathematical expression.

Answer 1

The first law of thermodynamic is a version of the law of conservation of energy, adapted for thermodynamic system. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed. The first law is often formulated

[Delta U=Q-W.]

hope it helps..

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.