Basic Chemical Engineering Practice Test 7

1. 5 J of heat is taken out of the system and 20 J of work is done on the system, what is the change in internal energy of the system?

2. A stone has initial potential and kinetic energy as 5 J and 20 J respectively if the final kinetic energy of the stone is 15 J what is its final potential energy?

3. Which of the following is an intensive variable?

4. What is the change in internal energy of 1 mole of air ((C_v = 2.1 X 10⁴ J/mole^oC), if its temperature changes from 10^oC to 5^oC?

5. What is ∆E for a steady-state system?

6. Which of the following is a path function?

7. 5 Kg of steam is enclosed in a container with internal energy = 10 J/Kg, then 25 J of heat is supplied to the system, what is the final internal energy?

8. What is the change in potential energy of a stone of mass 1 Kg thrown up with a velocity 10 m/s and comes down?

9. A fluid in supplied to a cliff 10 m high, what is the change in specific potential energy of fluid?

10. For an open unsteady state system, 10 J of heat was supplied and 10 J of work was done by the system, what is the value of a change in enthalpy?