Chemical Process Calculation Questions and Answers – Internal Energy

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Internal Energy”.

1. _________ represents a microscopic account of all the molecular, atomic, and subatomic energies.
a) Potential energy
b) Kinetic energy
c) Internal energy
d) None of the mentioned
View Answer

Answer: c
Explanation: Internal energy represents a microscopic account of all the molecular, atomic, and subatomic energies.

2. Specific internal energy is a path variable. The statement is
a) True
b) False
c) Always true
d) None of the mentioned
View Answer

Answer: b
Explanation: Specific internal energy is a state variable.

3. Specific internal energy _________ stored.
a) can be
b) can not be
c) may be
d) may not be
View Answer

Answer:
Explanation: Specific internal energy can be stored.
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4. Internal energy is the function of
a) Temperature and Pressure
b) Temperature and Volume
c) Pressure and Volume
d) None of the mentioned
View Answer

Answer: b
Explanation: U = f(T,V).

5. Cv is the change in internal energy at constant _______________
a) Pressure
b) Temperature
c) Volume
d) None of the mentioned
View Answer

Answer: c
Explanation: Cv is the change in internal energy at constant Volume.
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6. Absolute values of internal energies ________ calculated.
a) can be
b) can not be
c) may be
d) may not be
View Answer

Answer: a
Explanation: Internal energies can be calculated relative to a reference state.

7. 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))?
a) 2 MJ
b) 4 MJ
c) 6 MJ
d) 8 MJ
View Answer

Answer: d
Explanation: U2 – U1 = n*Cv*(T2-T1).
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8. Which one is true for internal energy?
a) It is sum of all forms of energies associated with molecules of a system
b) It is a state function of a system
c) It is proportional to transnational K.E of the molecules
d) All of the mentioned
View Answer

Answer: d
Explanation: All are correct for internal energy and are part of its property.

9. Internal energy is a
a) Path variable
b) State variable
c) Neither path nor a state variable
d) None of the mentioned
View Answer

Answer: b
Explanation: Internal energy does not depend on path.
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10. 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?
a) 100 J/(Degree Celsius)(Kg mole)
b) 200 J/(Degree Celsius)(Kg mole)
c) 300 J/(Degree Celsius)(Kg mole)
d) 400 J/(Degree Celsius)(Kg mole)
View Answer

Answer: b
Explanation: U2 – U1 = n*Cv*(T2-T1).

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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