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Describe the work done by a system, heat transfer between objects, and internal energy change of a system; Calculate the work, heat transfer, and internal energy change in a simple process
- 7.3: Internal Energy, Work and Heat - Chemistry LibreTexts
Work can be defined as a gas changing volume against a...
- 7.3: Internal Energy, Work and Heat - Chemistry LibreTexts
Describe the work done by a system, heat transfer between objects, and internal energy change of a system; Calculate the work, heat transfer, and internal energy change in a simple process
Describe the work done by a system, heat transfer between objects, and internal energy change of a system. Calculate the work, heat transfer, and internal energy change in a simple process. We discussed the concepts of work and energy earlier in mechanics.
In order to understand the relationship between heat, work, and internal energy, we use the first law of thermodynamics. The first law of thermodynamics applies the conservation of energy principle to systems where heat and work are the methods of transferring energy into and out of the systems.
Work can be defined as a gas changing volume against a constant external pressure. Heat is the transfer of energy due to temperature differences. Heat can be calculated in terms of mass, temperature change, and specific heat. The total change in internal energy for the system is the sum of the work and the heat.
Learn the basics of heat, internal energy and work here. Also, understand how to calculate the work done by a system and the formula used to calculate it.
Work and heat change the internal energy of a system. The first law: conservation of energy in thermodynamic calculations. The most general expression for the energy of a system accounts for kinetic energy (K), potential energy of position (V), and internal energy (U): (Eqn 1) .
