Quiz 1: Introduction – MJNEXIS-ERA

Thermodynamics for Chemical Engineers 1

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You have 15 minutes and 30 seconds for 30 questions. All the best!!!

Quiz 1: Introduction

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1. Which of the following is an extensive property?

1. Volume

2. Temperature

3. Pressure

4. Density

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2. A closed system is also called a control volume

1. True

2. False

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3. A pressure reading of zero on a gauge implies?

1. Critical pressure

2. Absolute vacuum

3. Pressure equal to atmospheric pressure

4. No pressure acting

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4. Mechanical equilibrium implies?

1. No unbalanced forces

2. Constant mass

3. Uniform temperature

4. No chemical reactions

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5. An isolated system is one that...

1. Is perfectly insulated

2. Exchanges neither mass nor energy

3. Exchanges mass but not energy

4. Exchanges energy but not mass

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6. 27°C to Kelvin is approximately...

1. 300 K

2. 310 K

3. 273 K

4. 246 K

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7. A piston-cylinder with a moving piston is an example of a system with a

1. Imaginary boundary

2. Fixed boundary

3. Moveable boundary

4. Rigid boundary

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8. If a vacuum pressure of 30 kPa is recorded and atmospheric pressure is 100 kPa, the absolute pressure is?

1. 130 kPa

2. 30 kPa

3. 70 kPa

4. 100 kPa

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9. Which property is intensive?

1. Temperature

2. Volume

3. Total energy

4. Mass

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10. Properties of a system are best described as being used to...

1. Define the state of the system

2. Describe how fast a process occurs

3. Control reactions

4. Measure work done by the system

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11. Which of the following are absolute temperature scales? Select all that apply.

1. Rankine

2. Celsius

3. Fahrenheit

4. Kelvin

5. Centigrade

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12. Which of the following best describes a control volume?

1. A fixed region in space through which mass may flow

2. A system whose conditions can be monitored and controlled

3. A system that cannot exchange energy

4. A fixed mass under study

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13. Absolute pressure is given by?

1. Gauge pressure+atmospheric pressure

2. Atmospheric pressure-gauge pressure

3. Vacuum pressure+gauge pressure

4. Gauge pressure-atmospheric pressure

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14. How can you convert an extensive property to a specific property?

1. Multiply by mass

2. Divide by mass

3. Add mass

4. Subtract mass

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15. A system is said to be in equilibrium when...

1. Properties change very slowly

2. No net driving forces exist

3. Work output is zero

4. Heat is transferred at a constant rate

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16. Gauge pressure is measured relative to?

1. Atmospheric pressure

2. Critical pressure

3. Absolute zero pressure

4. Vacuum pressure

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17. Absolute temperature scales are preferred in thermodynamic applications usually because...

1. Zero corresponds to minimum molecular energy

2. They balance out well with other common properties

3. They are easier to measure

4. They avoid negative values

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18. Pressure is defined as?

1. Force acting normally per unit area

2. Force per unit volume

3. Energy acting normally per unit area

4. Energy per unit volume

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19. A closed system is also called a control mass.

1. True

2. False

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20. The zeroth law of thermodynamics is important because it allows us to?

1. Conserve energy

2. Define work

3. Link the first and second laws

4. Define temperature

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21. The universe is a system and its surroundings.

1. False

2. True

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22. A system that undergoes a cycle...

1. Does no work

2. Ends at a different state

3. Has zero net energy change

4. Has zero heat transfer

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24. Thermodynamics is primarily concerned with?

1. The rate at which processes occur

2. Chemical reaction kinetics

3. The transformation of energy and its relation to work and heat

4. Molecular motion at the atomic scale

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25. An open system is also called a control mass.

1. False

2. True

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26. A gas initially at 400 K is cooled to 103°C. What is the change in temperature?

1. 24 K

2. 230 K

3. 570 K

4. 297 K

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27. A pressure gauge reads 250 kPa. If atmospheric pressure is 100 kPa, the absolute pressure is?

1. 250 kPa

2. 350 kPa

3. 150 kPa

4. 100 kPa

5. 175 kPa

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28. An open system is also called a control volume

1. False

2. True

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29. Which of the following statements is true?

1. Heat and work are path functions

2. Work is stored in a system

3. Heat is stored in a system

4. Heat and work are properties

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30. Which law of thermodynamics explains why heat does not spontaneously flow from a cooler region to a warmer one?

1. Third law

2. Zeroth law

3. First law

4. Second law

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