Thermodynamics
Telangana Open School (TOSS) · Class 12 · Physics
Most important questions from Thermodynamics for Telangana Open School (TOSS) Class 12 Physics board exam 2026. MCQs, short answer, and long answer questions with marks.
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Sample Questions
What is the value of 1 calorie in joules?
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4.18 J
One calorie is equivalent to 4.18 joules of energy.
Which system can exchange both mass and energy with surroundings?
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Open system
An open system can exchange both mass and energy with its surroundings. A water heater is an example.
Which of the following is a state variable?
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Internal Energy
Internal energy depends only on the state of the system, not on the path taken. Work and heat are path-dependent.
What happens to internal energy in an isothermal process for an ideal gas?
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Remains constant
In an isothermal process, temperature remains constant. For an ideal gas, internal energy depends only on temperature, so it remains unchanged.
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