With increase in temperature, the internal energy of a substance___________________?

Related Mcqs:

1. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?

   A. Decreases B. Increases C. Remains constant D. Decreases logarithmically...

2. For a constant volume process _____________ by the system is used only to increase the internal energy?

   A. Heat absorbed B. Work done C. Both A. & B D. Neither A. nor B...

3. Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is ___________________?

   A. 0 B. ∞ C. +ve D. -ve...

4. Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which___________________?

   A. A homogeneous solution (say of phenol water) is formed B. Mutual solubility of the two liquids shows a decreasing trend C. Two liquids are completely separated into two layers D. None of these...

5. Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?

   A. Positive B. Negative C. Zero D. Infinity...

6. Internal energy of an ideal gas___________________?

   A. Increases with increase in pressure B. Decreases with increase in temperature C. Is independent of temperature D. None of these...

7. If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the____________________?

   A. Process must be isobaric B. Temperature must decrease C. Process must be adiabatic D. Both B. and C....

8. The internal energy of an incompressible fluid depends upon its_________________?

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

9. Internal energy of an element at 1 atm and 25° C is ____________ kcal/kg.mole?

   A. 0 B. 273 C. 25 D. None of these...

10. When a gas in a vessel expands, its internal energy decreases. The process involved is________________?

    A. Reversible B. Irreversible C. Isothermal D. Adiabatic...