Process Calculations – Multiple Choice Questions (MCQs)

1. 61. In the general energy balance, what does 'Ws' represent?

   • A. Heat added to the system
   • B. Shaft work done by the system
   • C. Internal energy
   • D. Kinetic energy

2. 62. Which of the following is a state function?

   • A. Heat
   • B. Work
   • C. Enthalpy
   • D. Path function

3. 63. What is a material balance with reaction?

   • A. A material balance where chemical reactions occur
   • B. A material balance where no reactions occur
   • C. An energy balance
   • D. A phase equilibrium calculation

4. 64. What is the extent of reaction (ξ)?

   • A. A measure of the progress of a chemical reaction
   • B. The rate of reaction
   • C. The equilibrium constant
   • D. The amount of product formed

5. 65. How can the heat of reaction be calculated using heats of formation?

   • A. Sum of ΔH°f of products - Sum of ΔH°f of reactants
   • B. Sum of ΔH°f of reactants - Sum of ΔH°f of products
   • C. Sum of heats of combustion
   • D. Sum of latent heats

6. 66. What is the critical point?

   • A. The temperature and pressure at which liquid and vapor phases become indistinguishable
   • B. The triple point
   • C. The boiling point
   • D. The melting point

7. 67. What is a process flow diagram (PFD)?

   • A. A diagram showing the flow of materials and energy through a process
   • B. A diagram showing the electrical connections
   • C. A diagram showing the building layout
   • D. A diagram showing the organizational structure