At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature?

Related Mcqs:

1. 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

2. Except for monatomic gases, the molal heat capacity at constant volume for all gases is _____________ Kcal/Kg mole.° K?

   A. 3
   B. > 3
   C. < 3
   D. < 1

3. 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

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. 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

7. The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?

   A. 0.07
   B. 0.09
   C. 0.11
   D. 0.13

8. Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the ‘corresponding states’. At equal reduced conditions i.e., at the corresponding state, the ____________ of different gases are nearly the same?

   A. Compressibility
   B. Molecular weight
   C. Humidity
   D. None of these

9. For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ?

   A. Dry bulb temperature
   B. Wet bulb temperature
   C. Humidity
   D. Relative saturation

10. The effect of pressure on the heat capacity of the gases ______________ is negligible?

    A. At pressure below one atmosphere
    B. Below the critical temperature
    C. Both A. & B.
    D. Neither A. nor B.