Thermodynamics questions
1906 published questions with worked solutions.
- The combustion of benzene (l) gives CO_2(g) and H_2O(l). Given that heat of combustion of benzene at constant volume is –3263.9...
- At 320 K, a gas A_2 is 20 % dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol^ -1 is approximately...
- The correct order of hydration enthalpies of alkali metal ions is:
- Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes...
- For silver, C_p (JK^ -1 mol^ -1 ) = 23 + 0.01 T. If the temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1...
- Among the following, the set of parameters that represents path functions, is: (A) q + w (B) q (C) w (D) H − TS
- The difference between ΔH and ΔU (ΔH − ΔU), when the combustion of one mole of heptane (l) is carried out at a temperature T, is...
- A Carnot's engine works as a refrigerator between 250 K and 300 K. It receives 500 cal heat from the reservoir at the lower...
- Two Carnot engines A and B are operated in series. Engine A receives heat from a reservoir at 600 K and rejects heat to a...
- Given (i) 2Fe_2O_3(s) → 4Fe(s) + 3O_2(g); _rG° = + 1487.0 kJ mol^ -1 (ii) 2CO(g) + O_2(g) → 2CO_2(g); _rG° = –514.4 kJ mol^ -1...
- n moles of an ideal gas with constant volume heat capacity C_V undergo an isobaric expansion by certain volume. The ratio of the...
- A process will be spontaneous at all temperatures if:
- Two Carnot engines A and B are operated in series. The first one, A, receives heat at T_1 (= 600 K) and rejects to a reservoir at...
- The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is: (Specific heat of water...
- Enthalpy of sublimation of iodine is 24 cal g^ -1 at 200 °C. If specific heat of I_2(s) and I_2(vap) are 0.055 and 0.031 cal g^...
- An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in kJ is:
- Given: (i) C(graphite) + O_2(g) → CO_2(g); _rH° = x kJ mol^ -1 ; (ii) C(graphite) + ½O_2(g) → CO(g); _rH° = y kJ mol^ -1 ; (iii)...
- For the equilibrium, 2H_2O ⇌ H_3O^+ + OH^-, the value of ΔG° at 298 K is approximately:
- The reaction, MgO(s) + C(s) → Mg(s) + CO(g), for which _rH° = +491.1 kJ mol^ -1 and _rS° = 198.0 JK^ -1 mol^ -1 , is not feasible...
- The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by _rG° = A - BT, where A and B...
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Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration