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

Spray test determines the ________ of refractories?

Regenerators as compared to recuperators for the same duty________?

Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are________?

Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?

Pick out the wrong statement?