Q. The amount of usable energy, which is available for doing work, when the temperature and pressure are uniform throughout the system is called
A) Enthalpy
B) Activation energy
C) Spontaneous energy
D) Free energy
Explanation
Free energy is the portion of a system’s energy that can perform work when temperature is uniform throughout the system as in a living cell. Enthalpy is the total energy including usable energy and unusable energy.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.