A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease; depends on the substance
Related Mcqs:
- 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 - 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 - 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 - 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 - 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 - 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 - 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. - The internal energy of an incompressible fluid depends upon its_________________?
A. Pressure
B. Temperature
C. Both A. & B
D. Neither A. nor B - 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 - When a gas in a vessel expands, its internal energy decreases. The process involved is________________?
A. Reversible
B. Irreversible
C. Isothermal
D. Adiabatic
