Chemical Engineering Thermodynamics MCQ Questions & Answers | Chemical Engineering

Heat evolved or absorbed during allotropic change is called heat of transition.

Work done in a non-flow process is calculated by $$W = \int {} PdV$$    for different processes we substitute suitable terms in place of $$P.$$

Heat capacity for most of the solids is given by $$C = a + bT + c{T^2} + ...$$
So, the heat capacity usually increases with temperature.

When a gas is subjected to adiabatic expansion like throttling any real fluid will lose some of its internal energy (mainly pressure energy if the flow is assumed to reach fully developed flow n a horizontal pipe without any inclination) to do work against non-conservative force friction and the fluid temperature should rise but according to ideal gas law if the pressure decreases than temperature also should decrease so, it depends on which effect is dominating.

Generation of heat by friction is obviously leads to irreversible process (a process where either system or surroundings will not come to their initial state when the system s brought back to its original position).

In rotary lime $$klin$$ there will $$b$$ transfer of both energy and mass so, it is an open system. Generally used during constructions.

Since sound propagation takes place very fastly there will be no time for heat interaction and hence it is considered as adiabatic process.

Since sudden bursting of cycle tube takes place very fastly there will be no time for heat interaction and hence it is considered as adiabatic process.

Since pressure external is zero in case of expansion in vacuum, the work done will be zero.