One mole of an ideal gas is compressed quasistatically from an initial volume of to a…
PHYSICS · Multi-part · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
One mole of an ideal gas is compressed quasistatically from an initial volume of 5.0L to a final volume of 2.0L along two different reversible paths: Path A is isothermal, while Path B is adiabatic.
(i) Using a qualitative P–V diagram, describe how the shapes of the two paths differ between the same initial and final volumes.
(ii) During Path A, state whether heat is absorbed, rejected, or neither. Give your answer with a brief explanation based on the First Law of Thermodynamics.
(iii) During Path B, state whether the temperature of the gas increases, decreases, or remains unchanged. Support your answer with appropriate reasoning.
(iv) Explain why, for any common volume between 5.0L and 2.0L, the magnitude of the slope of Path B exceeds that of Path A.