629 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26PH0552 · The molecular partition function of a system is given by q(T)= (kB T/h c)2 (8 pi 3 m kB T/h2)2, where the symbols have their usual… · Statistical Thermodynamics – General
ABC26PH0553 · The ratio of molecules distributed between two states is 9.22×106 at 300K. the difference in energy (in kJ mol-1) of the two states is ____ · Statistical Thermodynamics – General
ABC26PH0554 · For an ideal gas with molar mass M, the molar translational entropy at a given temperature is proportional to · Statistical Thermodynamics – General
ABC26PH0555 · The rotational partition function of a diatomic molecule with energy levels corresponding to J=0, 1, is (where, varepsilon is a constant) · Statistical Thermodynamics – General
ABC26PH0556 · Consider a two-state system at thermal equilibrium with equal degeneracy where the excited state is higher in energy than the ground state… · Statistical Thermodynamics – General
ABC26PH0557 · Consider N particles at temperature T, pressure P, Volume V and chemical potential mu having energy E. The parameters that are kept… · Statistical Thermodynamics – General
ABC26PH0558 · Consider a two-state system at thermal equilibrium having energies 0 and 2 kB T for which the degenracies are 1 and 2, respectively. The… · Statistical Thermodynamics – General
ABC26PH0559 · Consider a system of three identical and distinguishable non-interacting particles and three available nondegenerate single particle energy… · Statistical Thermodynamics – General
ABC26PH0560 · Physisorbed particles undergo desorption at 27°C with an activation energy of 16.628 kJ mol-1. Assuming first order process and a frequency… · Surface Chemistry – General
ABC26PH0561 · According to conventional transition state theory, for elementary bimolecular reactions, the molar entropy of activation Delta S0 is: · Surface Chemistry – General
ABC26PH0562 · At 273 K and 10 bar, the langmuir adsorption of a gas on a solid surface gave the fraction of surface coverage as 0.01. The Langmuir… · Adsorption Isotherms
ABC26PH0563 · A monoatomic gas, X, adsorbed on a surface, Langmuir adsorption isotherm. A plot of the fraction of surface coverage, theta against the… · Adsorption Isotherms
ABC26PH0564 · The process given below follows the Langmuir adsorption isotherm A2(g) k-1k1⇌ 2 Aads · Adsorption Isotherms
ABC26PH0565 · Adsorption of CO on charcoal at 273 K follows Langmuir isotherm. A plot of P(kPa) / V (cm3) versus P(kPa) is linear with a slope of 0.01 y… · Adsorption Isotherms
ABC26PH0566 · The dissociative chemisorption of X2(g) one a metal surface follows langmuir adsorption isotherm. The ratio of the rate constants of the… · Adsorption Isotherms
ABC26PH0567 · For low partial pressure of ozone (O3), the adsorption of ozone on graphite surface is the fully dissociative in nature and follows… · Adsorption Isotherms
ABC26PH0569 · In an adiabatic system, the work done to change its state from A to B is · Thermodynamics – General
ABC26PH0570 · The internal pressure, pi T=T ((∂ P)/(∂ T))V-P for one mole a Vander waals gas is · Thermodynamics – General
ABC26PH0571 · Standard entropy of crystalline carbon monoxide (in J / mol) at 0 K is around · Laws State Functions
ABC26PH0572 · The plot that describes a Carnot cycle is: · Thermodynamics – General
ABC26PH0573 · Delta Suniv 0 for the following reaction, at 298 K is: N2+3 H2 → 2 NH3 Delta Ssys0=-197 JK-1, Delta Hsys0=-91.8 kJ · Thermodynamics – General
ABC26PH0574 · The work done (in atm-L) on the gas in the process is · Thermodynamics – General
ABC26PH0575 · (being typed) · Thermodynamics – General
ABC26PH0576 · The expression which represents the chemical potential of the ith sp species (mu i) in a mixture (i ≠ j) is · Partial Molar Quantities
ABC26PH0577 · The temperature of 54 g of water is raised from 15° C to 75° C at constant pressure. The change in the enthalpy of the system (given that… · Laws State Functions
ABC26PH0578 · The specific volume of liquid water is 1.001 mL g-1 and that of ice is 1.0907 mL g-1 at ° C. If the heat of fusion of ice at this… · Thermochemistry
ABC26PH0579 · The entropy of mixing of 10 moles of 10 moles of helium and 10 moles of oxygen at constant temperature and pressure, assuming both to be… · Laws State Functions
ABC26PH0580 · The correct statement (s) among the following is/are (i) The vibrational energy levels of a real diatomic molecule are equally spaced. (ii)… · Free Energy Equilibria
ABC26PH0581 · The residual entropy of the asymmetric molecule N2 O in its crystalline state is 5.8 JK-1 mol-1 at absolute zero. The number of… · Laws State Functions
ABC26PH0582 · If a gas obeys the equation of state P(V-nb)=nRT, the ratio ((CP-CV))/((CP-Cv)ideal) is: · Thermodynamics – General
ABC26PH0583 · Among the following the system that would require the least amount of thermal energy to bring its temperature to 80°C. · Thermodynamics – General
ABC26PH0584 · Among the following, the reaction that is accompanied by a decrease in the entropy is · Laws State Functions
ABC26PH0585 · Given that the standard molar enthapies of formation of NO(g) and NO2(g) are, respectively, 90.3 kJ mol-1 and · Laws State Functions
ABC26PH0586 · The free energy change (Delta G) of 1 mole of an ideal gas that is compressed isothermally from 1 atm to 2 atm is: · Free Energy Equilibria
ABC26PH0587 · The molar entropy of crystalline CO at absolute zero is · Laws State Functions
ABC26PH0588 · For an ideal gas · Thermodynamics – General
ABC26PH0589 · Among W (work), Q (heat), U (internal energy) and S (entropy) · Laws State Functions
ABC26PH0590 · The change in entropy when two moles of Argon gas are heated at constant volume from 300 K to 500 K is: · Laws State Functions
ABC26PH0591 · At any temperature T, fugacity coefficient (gamma) is given by ln gamma =∫0P (Z-1)/(P′) dP′ where Z is the compressibility factor. The… · Thermodynamics – General
ABC26PH0592 · ((∂ G)/(∂ P))T= · Thermodynamics – General
ABC26PH0593 · For the process 1 Ar(300 K, 1 bar) → 1 Ar(200 K, 10 bar) assuming ideal gas behavior, the change in molar entropy is: · Laws State Functions
ABC26PH0594 · For the reaction X2 O4() → 2 XO2(g) at 298 K, given the values, Delta U=9 kJ and Delta S=84 JK-1, Delta G is · Thermodynamics – General
ABC26PH0595 · The change in enthalpy when 3 mol of liquid benzene transforms to the vapour state at its boiling temperature (80° C) and at 1 bar pressure… · Laws State Functions
ABC26PH0596 · The maximum non-PV work that a system can perform at constant P is · Thermodynamics – General
ABC26PH0597 · Consider the reaction: A+B ⇌ C The unit of the thermodynamic equilibrium constant for the reaction is · Free Energy Equilibria
ABC26PH0598 · A Carnot engine operates at 55% efficiency. If the temperature of reject steam is 105° C, then the absolute temperature of input steam is… · Thermodynamics – General
ABC26PH0599 · Given that the standard molar enthalpies of formation of NO(g) and NO2(g) are, respectively, 90.3 kJ mol-1 and 33.2 kJ mol-1, the enthalpy… · Thermodynamics – General
ABC26PH0600 · Which one of the following defines the absolute temperature of a system? · Thermodynamics – General
ABC26PH0601 · The internal energy of an ideal gas follows the equation U=3.5 PV+k, where k is a constant. The gas expands from an initial volume of 0.25… · Laws State Functions