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Chemical Thermodynamics Quiz 5

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10 Questions

Popular Questions In Chemical Thermodynamics Quiz 5

  • A substance which shows highest entropy is

  • For a reaction, at 300K enthalpy is 138 kJ and entropy change is 115 JK1JK^{-1} . Hence the free energy change of the reaction is

  • Bond enthalpies of H21H_2{^{-1}} , I2(g)I_{2(g)} and HI are 436, 151 and 298 kJ mol1mol^{-1} respectively. Hence enthalpy of formation of HI(g)HI_{(g)}  is

  • The average bond energy of C-H bond is 410 kJmol1kJmol^{-1} . The enthalpy change of atomisation of 3.2 g3.2 \ g  CH4(g)CH_{4(g)} is

  • For a certain reaction, ΔH\Delta H = -50 kJ and ΔS\Delta S = -80 JK1JK^{-1} , at what temperature does the reaction turn from spontaneous to non-spontaneous.

  • Third law of thermodynamics provides a method to evaluate which property?

  • One mole of which of the following has the highest entropy?

  • The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

  • In a reversible process the system absorbs 600 kJ heat and performs 250 kJ work on the surroundings. What is the increase in the internal energy of the system?

  • In a system where ΔE\Delta E = -51.0 kJ, a piston expanded against a pext of 1.2 atm giving a change in volume of 32.0 L. What was the change in heat of this system?