If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?

Related Mcqs:

1. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?

   A. 0
   B. 1
   C. ∞
   D. None of these

2. With increase in temperature, the atomic heat capacities of all solid elements_________________?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Decreases linearly

3. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) _______________ with increase in temperature?

   A. Varies linearly
   B. Increases
   C. Decreases
   D. Does not vary

4. A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?

   A. 13728 J
   B. 19206 J
   C. 4576 J
   D. 12712 J

5. “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?

   A. Law of Petit and Dulong
   B. Kopp’s rule
   C. Nernst heat theorem
   D. Trouton’s rule

6. In the reaction, H2 +I2 ⇌ 2HI, addition of an inert gas will___________________?

   A. Increase the partial pressure of H2
   B. Increase the partial pressure of I2
   C. Increase the total pressure and hence shift the equilibrium towards the right
   D. Not affect the equilibrium conditions

7. The heat capacities for the ideal gas state depend upon the_________________?

   A. Pressure
   B. Temperature
   C. Both A. & B.
   D. Neither A. nor B.

8. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?

   A. 100,000 kW
   B. 160,000 kW
   C. 200,000 kW
   D. 320,000 kW

9. Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants) ?

   A. (atm)Δx, when Δx is negative
   B. (atm)Δx, when Δx is positive
   C. Dimensionless, when Δx = 0
   D. (atm)Δx2, when Δx > 0

10. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?

    A. μ° + RT ln f
    B. μ°+ R ln f
    C. μ° + T ln f
    D. μ° + R/T ln f