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Calculate the work, heat transfer, and internal energy change in a simple process. We discussed the concepts of work and energy earlier in mechanics. Examples and related issues of heat transfer between different objects have also been discussed in the preceding chapters.
Heat is the transfer of energy due to a temperature difference, while internal energy is the total energy contained within a system, including both the kinetic energy of particles and potential energy due to their interactions.
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.
Specific Heat - Constant Pressure. The enthalpy - or internal energy - of a substance is a function of its temperature and pressure. The change in internal energy with respect to change in temperature at fixed pressure is the Specific Heat at constant pressure - cp .
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.
3.4 First law of thermodynamics – internal energy The first law of thermodynamics expresses that energy is conserved, when all forms of energy, including heat, are taken into account.
Calculate the work, heat transfer, and internal energy change in a simple process. We discussed the concepts of work and energy earlier in mechanics. Examples and related issues of heat transfer between different objects have also been discussed in the preceding chapters.
