Second Law of Thermodynamics
Physics ⇒ Heat and Thermodynamics
Second Law of Thermodynamics starts at 11 and continues till grade 12.
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See sample questions for grade 11
A Carnot engine operates between 600 K and 400 K. What is its maximum efficiency?
A Carnot engine operates between a hot reservoir at 500 K and a cold reservoir at 300 K. What is the maximum possible efficiency of this engine?
A Carnot refrigerator operates between 250 K and 300 K. If it removes 500 J of heat from the cold reservoir, how much work must be supplied?
A heat engine absorbs 600 J of heat from a hot reservoir and expels 400 J to a cold reservoir. How much work does it do?
A heat engine receives 800 J of heat from a hot reservoir and does 320 J of work. What is the efficiency of the engine?
A heat pump extracts 2000 J of heat from the outside and requires 500 J of work. How much heat is delivered to the inside?
A refrigerator removes 1200 J of heat from its interior and expels 1600 J to the room. How much work is done by the refrigerator?
Describe a real-life example where the Second Law of Thermodynamics is observed.
Describe the relationship between entropy and the reversibility of a process.
Describe the significance of the Second Law of Thermodynamics in the context of energy resources and efficiency.
Explain why heat cannot spontaneously flow from a cold object to a hot object.
Explain why no engine can be 100% efficient according to the Second Law of Thermodynamics.
Explain why perpetual motion machines of the second kind are impossible.
Explain why the mixing of two gases is an irreversible process according to the Second Law of Thermodynamics.
If a process increases the entropy of the universe, is it reversible or irreversible?
State the Clausius statement of the Second Law of Thermodynamics.
