Thermodynamics questions
1906 published questions with worked solutions.
- Combustion of 1 mole of benzene is expressed as C_6H_6(l) + 15 2 O_2(g) → 6CO_2(g) + 3H_2O(l). The standard enthalpy of...
- A litre of dry air at STP expands adiabatically to volume of 3 litres. If = 1.40, the work done by air is : (3^ 1.4 = 4.6555)...
- A Carnot engine operates between two reservoirs of temperatures 900 K and 300 K. The engine performs 1200 J of work per cycle....
- For the reaction; A(l) 2B(g) U = 2.1 kcal, S = 20 cal K ^ -1 at 300 K Hence G in kcal is ______.
- A Carnot engine having an efficiency of 1 10 is being used as a refrigerator. If the work done on the refrigerator is 10 J, the...
- Arrange the following bonds according to their average bond energies in descending order: C–Cl, C–Br, C–F, C–I
- A heat engine is involved with exchange of heat of 1915 J, –40 J, +125 J and QJ, during one cycle achieving an efficiency of...
- The heat of combustion of ethanol into carbon dioxides and water is –327 kcal at constant pressure. The heat evolved (in cal) at...
- For the reaction at 298 K, 2A + B → C, ΔH = 400 kJ mol⁻¹ and ΔS = 0.2 kJ mol⁻¹ K⁻¹. The reaction will become spontaneous above...
- The gibbs energy change (in J) for the given reaction at [ Cu^ 2+ ]=[ Sn^ 2+ ] = 1 M and 298K is: Cu(s)+Sn^ 2+ (aq.) Cu^ 2+...
- The internal energy change (in J) when 90g of water undergoes complete evaporation at 100ºC is ____ . (Given : H_ vap for water...
- A balloon filled with helium (32°C and 1.7 atm) bursts. Immediately afterwards the expansion of helium can be considered as
- For one mole of an ideal gas, which of these statements must be true ? (a) U and H each depends only on temperature (b)...
- Match the thermodynamic processes taking place in a system with the correct conditions. In the table : Q is the heat supplied, W...
- In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found...
- Lattice enthalpy and enthalpy of solution of NaCl are 788 kJ mol ^ -1 and 4 kJ mol ^ -1 , respectively. The hydration enthalpy of...
- For a dimerization reaction, 2A(g) → A_2(g) at 298 K, U = – 20kJ mol ^ -1 , S = – 30J K ^ -1 mol ^ -1 , then the G will be...
- For a reaction, 4M(s)+nO_2(g) 2M_2O_n(s) , the free energy change is plotted as a function of temperature. The temperature below...
- In which of the following processes entropy increases? A. A liquid evaporates to vapour. B. Temperature of a crystalline solid...
- For the reaction, 2Cl(g) Cl_2(g), the correct option is :
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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