(A) Heat capacity of body (B) Specific heat capacity of body (C) Latent heat (D)Thermal conductivity

Описание: Match List-I with List-II.
List-I List-II (A) Heat capacity of body (I) J kg⁻¹
(B) Specific heat capacity of body (II) JK⁻¹
(C) Latent heat (III) J kg⁻¹K⁻¹
(D)Thermal conductivity (IV) Jm⁻¹K⁻¹s⁻¹

📘 Units of Thermal Properties | Heat, Specific Heat, Latent Heat, Thermal Conductivity | JEE Main 2025

This question is based on the fundamental thermal properties of matter and their corresponding units. Understanding which physical quantity has which unit is essential for JEE Main Physics, as it tests both conceptual clarity and dimensional reasoning.

🔍 Relevant Conceptual Theory:

• Heat capacity measures the total energy required to raise the temperature of a body by one degree. It depends on the mass and material, and its unit is based on energy per temperature.

• Specific heat capacity measures the energy required to raise one unit mass of a substance by one degree. It connects energy, mass, and temperature change, and is crucial for identifying energy transfer per unit mass.

• Latent heat represents the energy absorbed or released during a phase change without temperature change. Its unit shows the energy per unit mass, reflecting energy storage in phase transformations.

• Thermal conductivity quantifies how efficiently a material transfers heat through a unit area, per unit temperature gradient, in unit time. It combines energy, length, temperature difference, and time, linking material property to heat flow rate.

• Understanding units is not just about memorization; it helps visualize how physical quantities behave and how they relate to energy transfer in practical scenarios.

• These concepts are widely tested in JEE Main, NEET, and CBSE exams, especially in thermodynamics and heat transfer chapters.

🧠 Key Takeaways for JEE Aspirants:

✔ Connect physical quantities to their dimensions and units
✔ Avoid confusion between total heat capacity and specific heat capacity
✔ Understand latent heat vs heat capacity in phase change problems
✔ Recognize how thermal conductivity governs heat flow in materials
✔ Mastery of units helps in quick elimination of wrong options in MCQs

🎯 Exam Relevance:

JEE Main 2025 (April Session)

Thermal Physics & Heat Transfer

CBSE Class 11 & 12 Physics

NEET Physics (thermodynamics concepts)

📌 Conceptual clarity here allows fast reasoning for energy transfer and thermal problems, saving valuable exam time.

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