PRELIM EXAM ChE 4241

The combustion reactions of ethylene with oxygen in the catalyst bed

• tends to raise the temperature

• tends to decrease the temperature

• tends to increase the reaction rate

• tends to decrease the reaction rate

The enthalpy change of reaction is called

• heat of reaction

• heat of transfer

• heat of convection

• heat of radiation

Multiple phases at the same T and P are in equilibrium when the chemical potential of each species is the same in all phases.

• TRUE

• FALSE

The macroscopic properties of homogeneous PVT systems at internal equilibrium can be expressed as functions of temperature and pressure only.

• TRUE

• FALSE

In Carnot refrigeration cycle, it transfers heat from high temperature to low temperature.

• TRUE

• FALSE

The ratio of fugacity to pressure for a gas approaches ____ as pressure approaches zero.

• zero

• unity

• infinity

• an indeterminate value

Adopting efficient-fuel firing techniques and equipment results to higher efficiency in the combustion of solid fuel.

• TRUE

• FALSE

If hydrogen compound content of a fuel is zero, its gross and net calorific value is

• constant

• zero

• undetermined

• none of the choices

A coal having high amount of volatile matter produces an ample tar and gas on carbonization.

• TRUE

• FALSE