Question

Which of the following
is a formulation of
first law of thermodynamics
a) P ext = P-∆P
b) dw=-P ∆V
c) ∆U=Q+W
d) H=U+P V​

Answer 1

Answer:

The actual formula of first law of thermodynamics is

∆U=Q-W

where, ∆U=change in internal energy

Q=heat added and

W=work done by the system.