Calculate the amount of heat power that is generated by the isothermal process

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Homework Help Overview

The discussion revolves around calculating the amount of heat power generated during an isothermal process, specifically within the context of a larger cyclic process. The first law of thermodynamics is referenced as a foundational principle for this calculation.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster expresses uncertainty about the relevance of the isothermal condition and its implications for the problem. They also mention a potential method involving mechanical work but feel hindered by insufficient information.
  • Another participant notes that in an isothermal process for an ideal gas, the internal energy remains constant, leading to the relationship Q = -W.

Discussion Status

Participants are exploring the implications of the isothermal condition and its relationship to internal energy and work. Some guidance has been provided regarding the relationship between heat and work in this context, but there is no explicit consensus on the next steps or a complete solution.

Contextual Notes

The original poster indicates a lack of additional information that may be necessary for a complete analysis, which is a point of concern in their reasoning process.

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Homework Statement



200W of power is required for an isothermal process of a larger cyclic process.
Use the first law of thermodynamics to calculate the amount of heat power that is generated by the isothermal process.

Homework Equations



Change in heat energy = change in internal energy + mechanical work done on surroundings

The Attempt at a Solution



I'm a little lost as to how to begin! I know an isothermal process is one in which the temperature remains constant but is that needed here? Or will it simply be employed in the rest of the question after this?

Also I know that I can change the mechanical work into (pressure)(change in volume) but I feel this leads nowhere due to the lack of other information in the question!
 
Last edited:
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hello,

in an isothermal process, the internal energy is also constant (assuming this is an ideal gas), and so Q=-W.
 
Oh ok - I should be good from there with the rest of the question... Thanks a million!
 
cheers.
 

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