USCG Exam PracticeThermodynamics and heat exchangers
Heat is defined in thermodynamics as which of the following?
- A. Energy stored in a substance by molecular motion and configuration
- ✓ Energy in transit driven by a temperature differenceCorrect
- C. A force acting through a distance
- D. Internal energy plus the product of pressure and volume
Why B is correct
DOE-HDBK-1012 §1-1 defines heat as energy in transit driven by a temperature difference, flowing spontaneously only from hot to cold. Option A describes internal energy, option C describes work, and option D describes enthalpy.
Cited:DOE-HDBK-1012 §1-1