Question

The enthalpy is _____

(a) H = U+ p*V

(b) H = U+ p

(c) H = U+I

(d) H = U+ p*V^2

The question was posed to me during an interview.

My question comes from Energy Equation in portion Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

Right option is (a) H = U+ p*V

Explanation: Enthalpy is the total heat content in a system. ‘H’ is enthalpy, ‘U’ is internal energy, ‘p’ is the pressure and ‘V’ is the volume. Enthalpy is an extensive property. It is equal to the product of internal energy plus the product of pressure and volume.