Physics · Thermodynamics
Consider a hypothetical engine cycle on a P-V diagram consisting of three steps: step 1 to 2 is isothermal, step 2 to 3 is adiabatic, and step 3 to 1 is adiabatic. Such a thermodynamic cycle cannot exist primarily because:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1heat cannot be completely converted into mechanical energy in a cyclic process.
- 2mechanical energy cannot be completely converted into heat.
- 3two distinct adiabatic curves corresponding to different states cannot intersect each other.✓
- 4an adiabatic curve and an isothermal curve can never intersect each other.
Correct answer
two distinct adiabatic curves corresponding to different states cannot intersect each other.
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