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MHT-CET Thermodynamics — practice questions

Explore 76 free Thermodynamics questions in MHT-CET Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Thermodynamics questions and exercises with answers

Showing questions 1–30 of 76.

Which law of thermodynamics leads to the concept of temperature?Read the answer and worked solution →In which year was the zeroth law of thermodynamics formulated?Read the answer and worked solution →Bodies A and B are each in thermal equilibrium with C. What follows for A and B?Read the answer and worked solution →Two systems in thermal equilibrium must have equal values of which quantity?Read the answer and worked solution →Before heat was understood as energy, it was pictured as an invisible fluid calledRead the answer and worked solution →Count Rumford's 1798 cannon-boring observation supported which idea?Read the answer and worked solution →Thermodynamics is best described as which kind of science?Read the answer and worked solution →A bullet pierces a wooden block and stops. Its kinetic energy mainly becomesRead the answer and worked solution →Why is internal energy called a state variable?Read the answer and worked solution →Which pair are NOT thermodynamic state variables?Read the answer and worked solution →Heat flows on its own between two bodies in contact fromRead the answer and worked solution →Between two given states, which quantity is independent of the path taken?Read the answer and worked solution →A gas expands by 2 x 10^-3 m^3 against a steady pressure of 10^5 Pa. Work done by the gas isRead the answer and worked solution →What is the SI unit of specific heat capacity?Read the answer and worked solution →Heat capacity per mole of a substance per kelvin is called itsRead the answer and worked solution →By equipartition of energy, the molar specific heat of a solid is aboutRead the answer and worked solution →Which solid is an exception to the 3R rule for molar heat at room temperature?Read the answer and worked solution →The prediction C = 3R for solids fails mainly atRead the answer and worked solution →One calorie is the heat needed to warm 1 g of water fromRead the answer and worked solution →About how much heat raises 100 g of water from 20 °C to 30 °C?Read the answer and worked solution →For an ideal gas, Cp - Cv equalsRead the answer and worked solution →An ideal gas has Cv = 20.8 J mol^-1 K^-1. Taking R = 8.31 J mol^-1 K^-1, Cp is aboutRead the answer and worked solution →For an ideal gas, Cv equals change in internal energy per kelvin per mole because U depends only onRead the answer and worked solution →A relation connecting state variables such as PV = µRT is calledRead the answer and worked solution →How many independent state variables does a fixed amount of ideal gas have?Read the answer and worked solution →A pressure-volume curve drawn at fixed temperature is calledRead the answer and worked solution →A gas in equilibrium is split into two equal halves. Which quantity is halved in each part?Read the answer and worked solution →Why can a gas during sudden free expansion into vacuum not be described by state variables?Read the answer and worked solution →A quasi-static process is one that isRead the answer and worked solution →In a quasi-static process, the system and surroundings differ in pressure byRead the answer and worked solution →

Worked practice questions

Which law of thermodynamics leads to the concept of temperature?

  1. Third law
  2. First law
  3. Second law
  4. Zeroth law
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Correct answer: D. Zeroth law

Two systems each in thermal equilibrium with a third share a common property, and that property is defined as temperature.

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In which year was the zeroth law of thermodynamics formulated?

  1. 1798
  2. 1824
  3. 1850
  4. 1931
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Correct answer: D. 1931

Fowler gave the zeroth law in 1931, after the first and second laws were already named.

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Bodies A and B are each in thermal equilibrium with C. What follows for A and B?

  1. They are in equilibrium
  2. Heat flows from A to B
  3. Only C has a temperature
  4. A is hotter than B
Show answer and solution

Correct answer: A. They are in equilibrium

Since TA = TC and TB = TC, it follows that TA = TB, so A and B are in thermal equilibrium with each other.

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