Chemical Thermodynamics — Important Questions
Maharashtra Board · Class 12 · Chemistry
45 important questions from Chemical Thermodynamics for Maharashtra Board Class 12 Chemistry, with answers. Written for the board exams 2027.
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Important Questions from Chemical Thermodynamics
Which of the following processes are reversible? (Select all correct answers)
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Isothermal expansion of ideal gas, Adiabatic compression, Slow heating at constant pressure
Reversible processes occur infinitely slowly with the system always in equilibrium. Free expansion and mixing are irreversible processes.
Which of the following are state functions? (Select all correct answers)
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Internal energy (U), Enthalpy (H), Entropy (S)
State functions depend only on the initial and final states, not on the path. U, H, and S are state functions, while Q and W are path functions.
The relationship between enthalpy and internal energy is given by:
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H = U + PV
Enthalpy is defined as H = U + PV, where U is internal energy, P is pressure, and V is volume.
For the reaction H₂O(s) → H₂O(l), the enthalpy change is called:
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Enthalpy of fusion
The conversion of solid to liquid at constant temperature and pressure is called fusion. The enthalpy change for this process is enthalpy of fusion.
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