Why do we use "work = − PΔV" for isothermal process instead of "wo

1.	Why do we use "work = − PΔV" for isothermal process instead of "work = − nRΔT"?
Answer» In ISOTHERMAL PROCESS,, change in temperature is zero. i.e. zero workdone so to that we use first formula for answer INSTEAD of zero

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Why do we use "work = − PΔV" for isothermal process instead of "work = − nRΔT"?

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