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8 doubts found
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JEEPhysicseasy
What does “First law of thermodynamics” actually mean in Thermodynamics & Kinetic Theory, and why does it matter for JEE?
energy conservation for gases: ΔU = Q − W, where W is work done BY the gas.
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JEEPhysicsmedium
I keep getting “First law of thermodynamics” questions wrong in Thermodynamics & Kinetic Theory. What's the trap?
getting the sign of W wrong (work done by vs on the gas).
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JEEPhysicseasy
What does “Internal energy” actually mean in Thermodynamics & Kinetic Theory, and why does it matter for JEE?
the total microscopic energy of a system; for an ideal gas it depends only on temperature.
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JEEPhysicsmedium
I keep getting “Internal energy” questions wrong in Thermodynamics & Kinetic Theory. What's the trap?
thinking internal energy depends on pressure or volume for an ideal gas.
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JEEPhysicseasy
What does “Second law of thermodynamics” actually mean in Thermodynamics & Kinetic Theory, and why does it matter for JEE?
heat flows spontaneously from hot to cold, and no engine can be 100% efficient.
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JEEPhysicsmedium
I keep getting “Second law of thermodynamics” questions wrong in Thermodynamics & Kinetic Theory. What's the trap?
believing you can fully convert heat into work in a cycle.
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JEEPhysicseasy
What does “Kinetic theory of gases” actually mean in Thermodynamics & Kinetic Theory, and why does it matter for JEE?
gas pressure comes from molecular collisions, and average molecular KE is proportional to absolute temperature.
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JEEPhysicsmedium
I keep getting “Kinetic theory of gases” questions wrong in Thermodynamics & Kinetic Theory. What's the trap?
using Celsius instead of Kelvin in gas relations.
Thermodynamics & Kinetic TheoryRead →