Carnot cycle, entropy, isothermal and adiabatic processes.
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Q1 · Thermodynamics (Class 12) · EASY
A Carnot engine operates between a source at 400 K and a sink at 300 K. What is the efficiency of this engine?
Q2 · Thermodynamics (Class 12) · MEDIUM
An ideal gas undergoes an adiabatic expansion. If the initial pressure is 5 atm and initial volume is 2 L, and the final volume is 4 L, what is the final pressure? (Given γ = 1.5 for the gas)
Q3 · Thermodynamics (Class 12) · HARD
A reversible heat engine operates in a cycle and takes 600 J of heat from a hot reservoir at 500 K. It performs 200 J of work and rejects heat to a cold reservoir. If a second Carnot engine operates between the same two reservoirs, what is the temperature of the cold reservoir?
Q4 · Thermodynamics (Class 12) · HARD
An ideal gas undergoes an adiabatic expansion from volume V to 2V. If the initial pressure is P and the adiabatic exponent γ = 1.4, what is the final pressure?