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Thermal Energy & Intermolecular Forces vs Thermal Interactions Video Lecture | Chemistry for JEE Main & Advanced

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FAQs on Thermal Energy & Intermolecular Forces vs Thermal Interactions Video Lecture - Chemistry for JEE Main & Advanced

1. What is thermal energy?
Ans. Thermal energy refers to the energy that is generated by the movement of particles within a substance. It is a form of kinetic energy that arises due to the random motion of atoms and molecules. The higher the temperature of a substance, the greater the thermal energy it possesses.
2. What are intermolecular forces?
Ans. Intermolecular forces are the attractive or repulsive forces that exist between molecules. These forces arise due to the interactions between the charged particles (electrons and protons) of different molecules. The strength of intermolecular forces determines the physical properties of substances, such as boiling point, melting point, and viscosity.
3. How do intermolecular forces affect thermal energy?
Ans. Intermolecular forces play a significant role in determining the thermal energy of a substance. Stronger intermolecular forces require more energy to overcome, resulting in higher boiling points and greater thermal energy. Weaker intermolecular forces, on the other hand, have lower boiling points and lower thermal energy.
4. What are thermal interactions?
Ans. Thermal interactions refer to the transfer of energy between objects or substances due to a temperature difference. These interactions can occur through three main processes: conduction (direct contact), convection (through the movement of fluids), and radiation (through electromagnetic waves). Thermal interactions allow for the transfer of thermal energy from a warmer object to a cooler one.
5. How does thermal energy impact phase changes?
Ans. Thermal energy plays a crucial role in phase changes, such as the transition from solid to liquid (melting) or liquid to gas (evaporation). During these phase changes, the thermal energy is used to break the intermolecular forces holding the particles together, allowing them to move more freely. Conversely, when the thermal energy decreases, these forces become stronger, causing the substance to change from gas to liquid (condensation) or liquid to solid (freezing).
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