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Homework answers / question archive / Need help with part C, please explain how to you came to your answer Isobaric, Isochoric, Isothermal, and Adiabatic Processes How are Q and W related during this isothermal expansion? Learning Goal: To recognize various types of processes on pV diagrams and to understand the relationship between pV-diagram geometry and the quantities Q, W, and deltaU
Need help with part C, please explain how to you came to your answer
Isobaric, Isochoric, Isothermal, and Adiabatic Processes How are Q and W related during this isothermal expansion? Learning Goal: To recognize various types of processes on pV diagrams and to understand the relationship between pV-diagram geometry and the quantities Q, W, and deltaU. The first law of thermodynamics is an expression of conservation of energy. This law states that changes in the internal energy of a system delta U can be explained in terms of energy transfer into or out of the system in the form of heat Q and/or work W. In this problem, we will write the first law of thermodynamics as delta U = Q_IN-Q_out + W_in-W_out. Here "in" means that energy is being transferred into the system, thereby raising its internal energy, and "out" means that energy is leaving the system, thereby reducing its internal energy. You will determine the sizes Both W and Q equal zero. Both W and Q provide energy input. Both W and Q provide energy output. W provides energy output, while Q provides energy input. They are equal in magnitude. W provides energy input, while Q provides energy output. They are equal in magnitude. You can tell that the system is losing internal energy due to work because its volume is increasing. The internal energy change during any isothermal process involving an ideal gas is zero, so here the system must gain as much energy in the form of heat as it loses by doing work during this process. Another way to get from state A to state B is to go vertically from A to point D, holding volume constant, and then go horizontally to point B, holding pressure constant.(Fiaure 3) A constant-volume path is called an isochoric process. A constant-pressure path is called an isobaric process. How are Q and W related during the isochoric part of the overall path from state A to state D? Both Q and W equal zero. Q provides energy input, while W equals zero. Q provides energy output, while W equals zero. Q provides energy input, while W provides energy output. Q provides energy output, while W provides energy input.
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