“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___________________?

Related Mcqs:

1. The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the___________________?

   A. Trouton’s rule
   B. Kopp’s rule
   C. Antoine equation
   D. Kistyakowsky equation

2. The amount of heat required to decompose a compound into its elements is _____________ the heat of formation of that compound from its elements?

   A. Less than
   B. More than
   C. Same as
   D. Not related to

3. Heat requirement for decomposition of a compound into its elements is _____________ that is evolved during the formation of that compound from its elements?

   A. The same
   B. Less than
   C. Greater than
   D. Different than

4. The atomic heat capacities of all solid elements ______________ with decrease in temperature?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Approach zero at 0°C

5. 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

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

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

7. For estimation of heat capacity of a solid compound, one can use________________?

   A. Clapeyron’s equation
   B. Gibb’s equation
   C. Kopp’s rule
   D. Trouton’s rule

8. Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10-3 T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to – 100°C is ____________________?

   A. 10.73 kJ
   B. 16.15 kJ
   C. 18.11 kJ
   D. 18.33 kJ

9. 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

10. 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