CBSE 11 Physics · U8
Thermodynamics
CBSE Class 11 Physics Unit VIII: thermal equilibrium, zeroth law, heat, work, internal energy, first and second laws, state variables, equation of state, and isothermal, adiabatic, reversible, irreversible, and cyclic processes.
Test yourself
A focused, distraction-free run through 35 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic 8.1
Thermal Equilibrium and State Variables
Thermal equilibrium, zeroth law, temperature, thermodynamic state variables, and the equation of state of an ideal gas.
Topic 8.2
First Law of Thermodynamics
Heat, work, internal energy, sign convention, and applications of the first law to simple processes.
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Topic 8.3
Work and P-V Diagrams
Work done by a gas, isobaric and isochoric processes, area under a P-V graph, and cyclic work.
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Topic 8.4
Isothermal and Adiabatic Processes
Isothermal and adiabatic changes of ideal gases, internal energy, heat exchange, and P-V curve comparison.
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Topic 8.5
Second Law and Cyclic Processes
Second law statements, spontaneous direction of heat flow, reversible and irreversible processes, and energy accounting over cyclic processes.
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