AP EAPCET 05-Jul-2022 Shift 2 Paper

(A) U=H−pV,
(B) G=H−TS,
(C) U=q+W
The enthalpy of system is sum of internal energy and product of pressure and volume.
∆H‌=∆U+p∆V;‌‌H=U+pV
U‌=H−pV
Also, ∆G=∆H−T∆S or G=H−TS
According to first law of thermodynamics,
∆U=q−W
∴ Equation (C), U=q+W is incorrect.
Option (b), only (A) and (B) are correct.