A gas is to be expanded in a cylinder such that its temperature remains constant. The resulting variation of pressure vs. volume is
- A. A parabola
- B. A hyperbola
- C. A straight line through origin
- D. None of these
Answer: B. A hyperbola
Explanation: For an isothermal process (constant temperature), $PV = C$ (constant), which represents a rectangular hyperbola on a P-V diagram.