Thermodynamics questions
1906 published questions with worked solutions.
- An exothermic reaction is one in which the reacting substances
- Given, 3C(s)+2Fe_2O_3(s) 4Fe(s)+3CO_2(g); H^ =-93657 cal C(s)+O_2(g) CO_2(g); H^ =-94050 cal If both values of H are at 25°C then...
- 50 mL of water takes 5 min to evaporate from a vessel on a heater connected to an electric source which delivers 400 W. The...
- Enthalpy change for a reaction does not depend upon
- Hess's law is applicable for the determination of heat of
- Which of the following is always negative for an exothermic reaction?
- 48 g of C(diamond) on complete combustion evolves 1584 kJ of heat. The standard heat of formation of gaseous carbon is 725...
- According to Hess's law, the heat of reaction depends upon
- The resultant heat change in a reaction is the same whether it takes place in one or several stages. This statement is called
- Which of the following reactions defines H_f^ ?
- The H_f^ of O_3, CO_2, NH_3 and HI are 142.2, -393.3, -46.2 and +25.9 kJ respectively. The order of their increasing stabilities...
- C+O_2 CO_2; H=x ...(i) CO+ 12O_2 CO_2; H=y ...(ii) Then the heat of formation of CO is
- Diborane is a potential rocket fuel which undergoes combustion according to the equation B_2H_6(g)+3O_2(g) B_2O_3(s)+3H_2O(g)....
- The bond dissociation energies of gaseous H_2, Cl_2 and HCl are 104, 58 and 103 kcal respectively. The enthalpy of formation of...
- The enthalpy of combustion of H_2, cyclohexene (C_6H_ 10 ) and cyclohexane (C_6H_ 12 ) are -241, -3800 and -3920 kJ per mol...
- In the combustion of 2.0 g of methane, 25 kcal heat is liberated. Heat of combustion of methane would be
- The temperature of 5 mL of a strong acid increases by 5°C when 5 mL of a strong base is added to it. If 10 mL of each is mixed...
- The enthalpy of vaporisation of a substance is 840 J/mol and its boiling point is 173 K. Its entropy of vaporisation is
- The heat of atomisation of PH_3(g) is 228 kcal per mol and that of P_2H_4(g) is 335 kcal per mol. The energy of the P-P bond is
- The heat of formation of CO(g) and CO_2(g) are -26.4 and -94.0 kcal respectively (using C(s)+ 12O_2(g) CO(g), H_1=-26.4 and...
Other chapters
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