Chemical Process Calculation Questions and Answers – Energy Balances without Reaction

This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Energy Balances without Reaction”.

1. The energy of a system plus surrounding can neither be created nor destroyed, Is the law of
a) Conservation of Mass
b) Conservation of Energy
c) Conservation of Momentum
d) None of the mentioned
View Answer

Answer: b
Explanation: The Conservation of Energy states that the energy of a system plus surrounding can neither be created nor destroyed.

2. For an unsteady state closed system , energy balance is
a) U+25B3E = U+25B3(U + PE + KE)
b) U+25B3E = U+25B3(U + PE – KE)
c) U+25B3E = U+25B3(U – PE -KE)
d) None of the mentioned
View Answer

Answer: a
Explanation: U+25B3E = U+25B3(U + PE + KE).

3. A general energy balance
a) U+25B3E = W + Q
b) U+25B3E = W – Q
c) U+25B3E = -W + Q
d) None of the mentioned
View Answer

Answer: a
Explanation: U+25B3E = W + Q.
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4. For a steady state closed system
a) U+25B3E > 0
b) U+25B3E < 0
c) U+25B3E = 0
d) None of the mentioned
View Answer

Answer: c
Explanation: For a steady state closed system, U+25B3E = 0.

5. For a steady state closed system
a) U+25B3U > 0
b) U+25B3U < 0
c) U+25B3U = 0
d) None of the mentioned
View Answer

Answer: c
Explanation: For a steady state closed system, U+25B3U = 0.
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6. For a steady state closed system
a) Q + W > 0
b) Q + W < 0
c) Q + W = 0
d) None of the mentioned
View Answer

Answer: c
Explanation: For a steady state closed system, U+25B3E = 0.

7. For an open system, energy balance is
a) U+25B3E = Q + W – U+25B3(H + KE + PE)
b) U+25B3E = Q + W + U+25B3(H + KE + PE)
c) U+25B3E = Q + W – U+25B3(H – KE + PE)
d) None of the mentioned
View Answer

Answer: a
Explanation: For an open system, U+25B3E = Q + W – U+25B3(H + KE + PE).
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8. Evaporator that concentrates a solute is an example of
a) Open, steady state process
b) Open, unsteady state process
c) Closed, steady state process
d) None of the mentioned
View Answer

Answer: a
Explanation: Evaporator that concentrates a solute is Open, steady state process.

9. Turbine is an example of
a) Open, steady state process
b) Open, unsteady state process
c) Closed, steady state process
d) None of the mentioned
View Answer

Answer: a
Explanation: Turbine is Open, steady state process.
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10. Batch Distillation is an example of
a) Open, steady state process
b) Open, unsteady state process
c) Closed, steady state process
d) None of the mentioned
View Answer

Answer: b
Explanation: Batch Distillation is Open, unsteady state process.

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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