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Heat, Work & Internal Energy Video Lecture | Chemistry for JEE Main & Advanced
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FAQs on Heat, Work & Internal Energy Video Lecture - Chemistry for JEE Main & Advanced
| 1. What is the relationship between heat, work, and internal energy? |  |
| 2. How is heat different from work in terms of energy transfer? | |
Ans. Heat and work are both ways in which energy can be transferred between objects, but they differ in the mechanism of transfer. Heat transfer occurs due to a temperature difference, where energy flows from a higher temperature object to a lower temperature object. On the other hand, work transfer occurs when a force is applied to an object and causes it to move or undergo deformation. While heat transfer is related to the thermal energy of the particles, work transfer is related to mechanical energy.
| 3. Can internal energy of a system change without the transfer of heat or work? | |
Ans. Yes, the internal energy of a system can change without the transfer of heat or work. Internal energy is the sum of the kinetic and potential energies of the particles within a system. It can change due to processes such as chemical reactions or phase transitions, where there is a change in the arrangement or energy state of the particles. These changes in internal energy can occur without the direct transfer of heat or work.
| 4. How does the first law of thermodynamics relate to the conservation of energy? | |
Ans. The first law of thermodynamics, also known as the law of energy conservation, states that energy cannot be created or destroyed in an isolated system. It can only be transferred or transformed from one form to another. This principle is based on the understanding that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Therefore, the first law of thermodynamics provides a mathematical expression of the conservation of energy.
| 5. What are some practical examples of heat and work transfer in everyday life? | |
Ans. Heat and work transfer occur in various everyday scenarios. Some examples of heat transfer include boiling water on a stove, feeling the warmth of the sun on your skin, or the cooling effect of a fan. Work transfer can be observed when lifting objects, riding a bicycle, or pushing a door open. In both cases, energy is being transferred from one object to another, either due to temperature differences or the application of a force.
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