jee_main_2026_24_january_morning - Thermodynamics Topics

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QUESTION #29 First Law of Thermodynamics
Density of water at 4° C and 20° C are 1000 kg/m³ and 998 kg/m³ respectively. The increase in internal energy of 4 kg water when it is heated from 4° C to 20° C is ____J. (Specific heat capacity of water = 4.2 J/g°C and 1 atmospheric pressure = 10⁵ Pa)
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QUESTION #63 Work Done in Isothermal Processes
Match the List-I with List-II
List-I (Isothermal process for ideal gas system)List-II Work done (Vf > Vᵢ)
A. Reversible expansionI. w = 0
B. Free expansionII. w = -nRT ln (Vf)/(Vᵢ)
C. Irreversible expansionIII. w = -pₑₓ(Vf - Vᵢ)
D. Irreversible compressionIV. w = -pₑₓ(Vᵢ - Vf)
Choose the correct answer from the options given below :
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JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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