Internal energy of a substance comprises of the _____________ energy?

Related Mcqs:

1. Total energy at a point comprises of _____________ energy?

   A. Potential & kinetic
   B. Pressure
   C. Internal
   D. All A., B. & C.

2. Internal energy is independent of the ____________ for an ideal gas?

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

3. A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?

   A. 380
   B. 630
   C. 760
   D. 880

4. The value of Trouton’s ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kistyakowsky equation is used for calculation of Trouton’s ratio of _____________ liquids?

   A. Polar
   B. Non-polar
   C. Both A. & B.
   D. Neither A. nor B.

5. The vapor pressure of a substance, at its melting point, is _____________ in the solid state as compared to that in the liquid state?

   A. Less
   B. More
   C. Same
   D. Either A. or B.; depends on the nature of the substance

6. Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?

   A. Vapor to liquid
   B. Vapor to solid
   C. Solid to liquid
   D. One allotropic form to another allotropic form

7. The heat capacity of a substance is ____________________?

   A. Greater for liquid state than for solid state
   B. Lower for liquid state than for gaseous state
   C. Higher for solid state than for liquid state
   D. Equal for solid and liquid states below melting point

8. The heat evolved in the combustion of benzene is represented by the equation: C6H6 + 7.5 O2 = 6CO2 + 3H2O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C6H6 is burnt in an open container, will be _____________ kJ/kgmole?

   A. +816.15
   B. +1632.3
   C. -1632.3
   D. -2448.45

9. At standard conditions, N2 + 2O2 ⇌ 2NO2; ΔG° = 100 kJ/mole NO + ½O2 ⇌ 2NO2; ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is___________________?

   A. 15
   B. 30
   C. 85
   D. 170

10. At a temperature of 0°K, the molecules of a gas have only _______________ energy?

    A. Rotational
    B. Vibrational
    C. Translational
    D. None of these