Test: Thermodynamics And Thermochemistry - 2 - Chemistry MCQ

The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of 10L to 20L is:

Work done during isothermal expansion of 1 mole of an ideal gas from 10 atm to 1 atm at 300K is:

ΔE° of combustion of isobut ylene is x KJ mol^-1. The value of ΔH° is:

The free energy change for a reversible reaction at equilibrium is:

The heat of neutralization of a strong acid and a strong alkali is 57.0 KJ mol^–1. The heat released when 0.5 mole of HNO₃ solution is mixed with 0.2 mole of KOH is:

Heat of formation of H₂O is –286 KJ per mole and H₂O₂ is –188 KJ mol^–1. The enthalpy change for the reaction

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

Given that bond energies of H–H and Cl–Cl are 430 and 240 KJ mol^–1 respectively, and ΔH_f for HCl is -90 KJ mol^-1. Bond enthalpy of HCl is:

Hess’s Law deals with:

One mole of methanol when burnt in O₂ gives out 723 KJ mol^–1 heat. If one mole of O₂ is used, what will be the amount of heat observed:

The enthalpy and entropy change for the reaction:

Are 30 KJ mol^–1 and 105 JK^–1mol^–1 respect ively. The temperature at which the reaction will be in equilibrium is:

The change in the entropy for the fusion of 1 mole of ice is:

(Melting point of ice = 273 K, molar enthalpy of fusion of ice = 6.0 KJ mol^–1):

For a spontaneous process, the correct statement is:

The abso lute enthalpy of neutralization of the reaction:

For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ΔU and W corresponds to:

Standard enthalpy and standard entropy changes for the oxidation of NH₃ at 298 K are –382.64 KJ mol^–1 and – 145.6 JK^–1mol^–1, respectively. Standard Gibb’s energy change for the same reaction at 298 K is:

ΔG = ΔH-TΔS was given by:

The heat capacity of 10 mol of an ideal gas at a certain temperature is 300 JK^–1 at constant pressure. The heat capacity of the same gas at the same temperature and at constant volume would be:

The internal pressureof a real gas is related to the compressibility factor

Entropy is:

(I) It is the degree of disorder of randomness in a system
(II) Entropy is a state function and mixing is always positive
(III) Entropy is a intensive property
(IV) Entropy of solid is minimum and gases is maximum
(V) Entropy increase wit h temperature, complexity and atomicity

The correct statement is:

From the following pairs, choose the substances with the higher entropy per mole at a given temperature:

(I) O₂ gas at 5 atm or O₂ gas at 0.5 atm
(II) Br₂ (L) or Br₂ (g)

For the gaseous substance 

Among the following, the system require higher amount of thermal energy to giving the temperature 80⁰C:

What is the internal pressure for 4 mole of Vander Waals gas:

Which of the following statement is correct:

 for ideal and Vander Waals gases respectively:

 A piston-cylinder contains 0.5 kg of air at 500 kPa and 500 K. The air expands in a process so the pressure is linearly decreasing with volume to a final state of 100 kPa and 300 K. Find the work in the process.