Chemical Process Calculation Questions and Answer

Question 1
Marks : +2 | -2
Pass Ratio : 100%
_________ represents a microscopic account of all the molecular, atomic, and subatomic energies.
Potential energy
Kinetic energy
Internal energy
None of the mentioned
Explanation:
Internal energy represents a microscopic account of all the molecular, atomic, and subatomic energies.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which one is true for internal energy?
It is sum of all forms of energies associated with molecules of a system
It is a state function of a system
It is proportional to transnational K.E of the molecules
All of the mentioned
Explanation:
All are correct for internal energy and are part of its property.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Specific internal energy _________ stored.
can be
can not be
may be
may not be
Explanation:
Specific internal energy can be stored.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Internal energy is the function of
Temperature and Pressure
Temperature and Volume
Pressure and Volume
None of the mentioned
Explanation:
U = f(T,V).
Question 5
Marks : +2 | -2
Pass Ratio : 100%
What is the change in internal energy when 10 kg mol of Oxygen is heated from 200 K to 400 K at constant volume (Cv = 4000 J/(Degree Celsius)(Kg.mole))?
2 MJ
4 MJ
6 MJ
8 MJ
Explanation:
U2 – U1 = n*Cv*(T2-T1).
Question 6
Marks : +2 | -2
Pass Ratio : 100%
A mass of 20 Kg mol is cooled from 200 K to 100 K and the change in internal energy is 400 KJ. What is the heat capacity at constant volume?
100 J/(Degree Celsius)(Kg mole)
200 J/(Degree Celsius)(Kg mole)
300 J/(Degree Celsius)(Kg mole)
400 J/(Degree Celsius)(Kg mole)
Explanation:
U2 – U1 = n*Cv*(T2-T1).
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Internal energy is a
Path variable
State variable
Neither path nor a state variable
None of the mentioned
Explanation:
Internal energy does not depend on path.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Cv is the change in internal energy at constant _______________
Pressure
Temperature
Volume
None of the mentioned
Explanation:
Cv is the change in internal energy at constant Volume.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Absolute values of internal energies ________ calculated.
can be
can not be
may be
may not be
Explanation:
Internal energies can be calculated relative to a reference state.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Specific internal energy is a path variable. The statement is
True
False
Always true
None of the mentioned
Explanation:
Specific internal energy is a state variable.