Calculate Heat Transferred in Gas with Constant Temp & Compression

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To calculate the heat transferred from a gas during isothermal compression, the relevant formula is Q = nRT ln(Vi/Vf), where Q is the heat transferred, n is the number of moles, R is the ideal gas constant, T is the absolute temperature, and Vi and Vf are the initial and final volumes, respectively. It is important to note that during isothermal processes, the temperature remains constant, which allows for the use of this logarithmic relationship. The pressure does change with volume, but the ideal gas law can still apply. Understanding these principles is crucial for accurately determining heat transfer in thermodynamic processes. Utilizing these equations will facilitate the analysis of isothermal expansion and compression scenarios.
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What is the formula to find the amount of heat transferred from a gas when the temperature is constant and the gas is being compressed?

I can't use W=-P deltaV as P will change with V.

So how to do this?

Thanks.
 
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