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

Related Mcqs:

1. 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___________________?

   A. Increase B. Decrease C. Remain unaltered D. Increase or decrease; depends on the particular reaction...

2. “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...

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. A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1 is_________________?

   A. -1.87 B. 0 C. 1.26 D. 3.91...

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

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

7. 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...

8. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same___________________?

   A. Period increases B. Period decreases C. Group increases D. Both ‘B’ & ‘C’...

9. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?

   A. AB3 B. A2B3 C. A2B D. AB2...

10. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

    A. 3 B. 30 C. 7 D. 70...