Chemical Engineering Thermodynamics MCQs

A large iceberg melts at the base, but not at the top, because of the reason that

High __________ is an undesirable property for a good refrigerant.

Pick out the undesirable property for a good refrigerant.

A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1.K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1.K-1 is

Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is -57°C and 5.2 atm).

When a system is in equilibrium for all possible processes, the differential or finite change of entropy is

Consider the reaction, C + O2 ⇋ CO2; ΔH = -94 kcal. What will be the value of ΔH for the reaction CO2 → C + O2?

In a working refrigerator, the value of COP is always