Thermodynamics terms is an important topic in the Physics section in MHT CET exam. Practising this topic will increase your score overall and make your conceptual grip on MHT CET exam stronger.
This article gives you a full set of MHT CET PYQs for Thermodynamics terms with explanations for effective preparation. Practice of MHT CET Physics PYQs including Thermodynamics terms questions regularly will improve accuracy, speed, and confidence in the MHT CET 2026 exam.
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MHT CET PYQs for Thermodynamics terms with Solutions
1.
The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?- $ 0.25\, mol $
- $ 1\, mol $
- $ 0.5\, mol $
- $ 2\, mol $
2.
For irreversible expansion of an ideal gas under isothermal conditions, which of the following is correct?- \( \Delta U > 0, \, q > 0 \)
- \( \Delta U = 0, \, q = -w \)
- \( \Delta U = 0, \, q = w \)
- \( \Delta U < 0, \, q < 0 \)
3.
A gas expands from a volume of 2 m³ to 4 m³ against a constant pressure of 5 atm. How much work is done by the gas during expansion? (1 atm = \( 1.01 \times 10^5 \, \text{Pa} \))- \( 2.02 \times 10^5 \, \text{J} \)
- \( 1.01 \times 10^5 \, \text{J} \)
- \( 5.02 \times 10^5 \, \text{J} \)
- \( 1.02 \times 10^5 \, \text{J} \)
4.
What is the entropy change when 1.0 kg of water at \( 100^\circ C \) is converted to steam at the same temperature? The latent heat of vaporization of water is \( 2.25 \times 10^6 \, \text{J/kg} \).- \( 2.25 \times 10^3 \, \text{J/K} \)
- \( 2.25 \times 10^6 \, \text{J/K} \)
- \( 2.25 \times 10^9 \, \text{J/K} \)
- \( 2.25 \times 10^7 \, \text{J/K} \)
5.
An ideal gas is contained in a cylinder with a movable piston. The gas undergoes an isothermal expansion from a volume of 2 liters to 8 liters at a temperature of 300 K. If the initial pressure of the gas is \( 2 \times 10^5 \, \text{Pa} \), calculate the work done by the gas during this expansion. (Use \( R = 8.31 \, \text{J/mol·K} \))- \( 7200 \, \text{J} \)
- \( 3600 \, \text{J} \)
- \( 1800 \, \text{J} \)
- \( 14400 \, \text{J} \)
6.
A 1.0 kg sample of water at \( 80^\circ C \) is placed in thermal contact with a 2.0 kg sample of water at \( 20^\circ C \). If the system is insulated, what will be the final equilibrium temperature of the system? Assume no heat loss to the surroundings, and the specific heat capacity of water is \( 4.18 \, \text{J/g}^\circ \text{C} \).- \( 40^\circ C \)
- \( 45^\circ C \)
- \( 50^\circ C \)
- \( 60^\circ C \)
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