Which of the Following Best Describes Enthalpy (H)

Question

Which of the following best describes enthalpy (H)?
A) the total kinetic energy of a system
B) the heat content of a chemical system
C) the system's entropy
D) the cell's energy equilibrium
E) the condition of a cell that is not able to react

Accepted Answer

Enthalpy (H) is defined as the heat content of a chemical system at constant pressure. It is a measure of the system's internal energy plus the amount of work required to displace its surroundings to make room for the system at constant pressure. The change in enthalpy (ΔH) is a thermodynamic quantity that represents the heat exchange between the system and its surroundings during a chemical reaction at constant pressure.