Question
Download Solution PDFWhich one of the following statements best defines the concept of heat?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Heat
- Heat is a form of energy transfer between systems or objects with different temperatures (thermal energy in transit).
- It always flows from the hotter object to the cooler one, until thermal equilibrium is reached.
- The SI unit of heat is the joule (J), but it is also commonly measured in calories (cal).
EXPLANATION:
- Among the given options:
- Option 1: "The transformation of energy from one form to another" is not specific to heat, as it applies to energy in general.
- Option 2: "The conversion of energy into mass and vice-versa due to temperature difference" refers to a relativistic concept (E=mc2), not heat transfer.
- Option 3: "The transfer of energy due to temperature difference" accurately describes heat.
- Option 4: "The change in volume of a substance with temperature" refers to thermal expansion, not heat itself.
Therefore, the best definition for heat among the options provided is The transfer of energy due to temperature difference.
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