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Specific heat capacity : dia-atomic gas - Kinetic Theory Video Lecture - Class 11

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FAQs on Specific heat capacity : dia-atomic gas - Kinetic Theory 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 substance by one unit per unit mass. It is a property that helps determine how much heat a substance can store or release.
2. What is a diatomic gas?
Ans. A diatomic gas is a gas composed of molecules that consist of two atoms. Examples of diatomic gases include oxygen (O2), nitrogen (N2), and hydrogen (H2).
3. How does kinetic theory explain specific heat capacity of a diatomic gas?
Ans. According to the kinetic theory of gases, the specific heat capacity of a diatomic gas can be explained by the motion and collisions of its molecules. When heat is added to a diatomic gas, its molecules gain kinetic energy and move faster. This increased molecular motion leads to more frequent and energetic collisions, resulting in an increase in temperature. The specific heat capacity determines how much heat energy is required to produce a certain temperature change in the gas.
4. What factors affect the specific heat capacity of a diatomic gas?
Ans. The specific heat capacity of a diatomic gas is influenced by several factors, including the number of atoms in the molecule, the degree of freedom of the molecules, and the intermolecular forces between the molecules. For example, diatomic gases with more complex molecules (e.g., carbon dioxide) have higher specific heat capacities compared to simpler diatomic gases (e.g., oxygen) due to the additional internal degrees of freedom.
5. How is the specific heat capacity of a diatomic gas experimentally determined?
Ans. The specific heat capacity of a diatomic gas can be determined experimentally using calorimetry. In this method, a known quantity of the gas is subjected to a known amount of heat, and the resulting temperature change is measured. By knowing the mass of the gas and the temperature change, the specific heat capacity can be calculated using the formula Q = mcΔT, where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the temperature change.
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