total heat
Học thuậtThân thiện
Definition
- Noun:
- (Thermodynamics) Enthalpy: A thermodynamic property of a system, defined as the sum of its internal energy and the product of its pressure and volume. It represents the total heat content of a system under constant pressure.
Usage Examples
- Noun:
- The total heat of the steam was calculated to determine the efficiency of the turbine.
- In this reaction, the change in total heat indicates it is exothermic.
Advanced Usage
- "Change in total heat": Refers to the enthalpy change (ΔH) of a system during a process, such as a chemical reaction or phase change.
- The change in total heat for the combustion process was measured in the calorimeter.
Variants and Related Words
- Enthalpy (n): The precise scientific term synonymous with total heat.
- The standard enthalpy of formation is a key value in thermochemistry.
- Heat content (n): A less formal, descriptive synonym for total heat or enthalpy.
- The heat content of the fuel determines its energy output.
Synonyms
- Enthalpy
- Heat content
- H (The standard symbol used in equations)
Related Phrases
- Total heat capacity: The amount of heat required to change a system's total heat (enthalpy) by one degree.
- The total heat capacity of the substance was surprisingly high.
- Total heat transfer: The overall exchange of enthalpy between systems.
- The engineer analyzed the total heat transfer in the heat exchanger.
Notes on Usage
- "Total heat" is a specialized term used primarily in physics, chemistry, and engineering contexts. In everyday language, "heat" alone is used more broadly.
- In thermodynamic equations, it is almost universally represented by the symbol H. The term "enthalpy" is more common in formal scientific literature.
Noun
- (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
- enthalpy is the amount of energy in a system capable of doing mechanical work