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Specific heat capacity - Thermodynamics Video Lecture - Class 11

FAQs on Specific heat capacity - Thermodynamics Video Lecture - Class 11

1. What is specific heat capacity?

Ans. Specific heat capacity is the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree Celsius. It is a property that determines how effectively a material can store and release heat.

2. How is specific heat capacity measured?

Ans. Specific heat capacity can be measured using the formula Q = mcΔT, where Q is the heat energy transferred, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature. By measuring the change in temperature and knowing the mass and heat energy, the specific heat capacity can be calculated.

3. What factors affect the specific heat capacity of a substance?

Ans. The specific heat capacity of a substance is influenced by several factors, including the type of material, its phase (solid, liquid, or gas), and any phase transitions it may undergo. Additionally, the specific heat capacity can vary with temperature, although for most substances this variation is relatively small.

4. How does specific heat capacity relate to thermal conductivity?

Ans. Specific heat capacity and thermal conductivity are related but different properties. Specific heat capacity measures a substance's ability to store heat, while thermal conductivity measures its ability to conduct heat. Some materials, like metals, have high thermal conductivities but relatively low specific heat capacities, meaning they can quickly transfer heat but do not store it well.

5. Can specific heat capacity vary with pressure?

Ans. In most cases, the specific heat capacity of a substance does not vary significantly with pressure. However, there are some exceptions, particularly for gases at very high pressures or near phase transitions. Generally, for solids and liquids, the specific heat capacity remains relatively constant with pressure.

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Oct 06, 2025 Last updated

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