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For an ideal gas in an isothermal process, PV stays:

AFalling
BAt zero
CConstant
DRising up
Answer & Solution
Correct answer: C. Constant
1. The ideal gas equation ties P, V and T together. 2. With T fixed, the product of P and V cannot change. 3. So PV stays constant. _Source: syllabus Physics Part II, Chapter 12, Thermodynamics._
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