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This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
1. |
Cp of water is 10 J/oC and that of steam is 15 J/oC, what is the enthalpy change of water from 75oC to 110oC at standard conditions, if the later heat of vaporization of water is 245 J? |
A. | 395 J |
B. | 645 J |
C. | 840 J |
D. | 999 JView answer |
Answer» C. 840 J | |
2. |
Cp of ice is 10 J/oC and that of water is 15 J/oC, what is the enthalpy change of water from – 15oC to 0oC at standard conditions, if the later heat of fusion of water is 110 J? |
A. | 150 J |
B. | 315 J |
C. | 485 J |
D. | 560 JView answer |
Answer» D. 560 JView answer | |
3. |
Cp of ice is 25 J/oC and that of water is 30 J/oC, what is the enthalpy change of water from – 10oC to 35oC at standard conditions, if the later heat of fusion of water is 110 J? |
A. | 250 J |
B. | 595 J |
C. | 960 J |
D. | 1410 JView answer |
Answer» E. | |
4. |
If Cp of water is 45T J/oC, what is the enthalpy change of water from 6oC to 8oC? |
A. | 7 J |
B. | 14 J |
C. | 28 J |
D. | 56 JView answer |
Answer» C. 28 J | |
5. |
If Cp of water is (23 + T) J/oC, what is the enthalpy change of water from 3oC to 5oC? |
A. | 54 J |
B. | 96 J |
C. | 140 J |
D. | 196 JView answer |
Answer» B. 96 J | |
6. |
If Cp of steam is 105 J/oC, what is the enthalpy change of steam from 106oC to 118oC? |
A. | 420 J |
B. | 640 J |
C. | 890 J |
D. | 1260 JView answer |
Answer» E. | |
7. |
If Cp of solid benzene is 10 J/oC, what is the enthalpy change of water from 5oC to 75oC? |
A. | 5 J |
B. | 10 J |
C. | 75 J |
D. | 700 JView answer |
Answer» E. | |
8. |
If Cp of liquid benzene is 15 J/oC, what is the enthalpy change of water from 5oC to 10oC? |
A. | 15 J |
B. | 50 J |
C. | 75 J |
D. | 90 JView answer |
Answer» D. 90 JView answer | |
9. |
If Cp of liquid water is 10 J/oC, what is the enthalpy change of water at standard conditions from – 10oC to 0oC? |
A. | 10 J |
B. | 50 J |
C. | 100 J |
D. | Cannot be determinedView answer |
Answer» E. | |
10. |
Heat of fusion of benzene is 10 J at 0oC, if Cp of solid benzene is 10 J/oC, and that of liquid benzene is 5 J/oC what is the enthalpy change of benzene from – 10oC to 10oC? |
A. | 160 J |
B. | 200 J |
C. | 240 J |
D. | 300 JView answer |
Answer» B. 200 J | |
11. |
150 J is the latent heat for vaporization of water, what is the heat of transition from 50oC water to 100oC steam if heat of transition from 50oC water to 100oC water is 12 J? |
A. | 12 J |
B. | 152 J |
C. | 162 J |
D. | 200 JView answer |
Answer» D. 200 JView answer | |
12. |
5 J is the latent heat for melting of ice, what is the heat of transition from 0oC ice to 15oC water if heat of transition from 0oC water to 15oC water is 12 J? |
A. | 5 J |
B. | 12 J |
C. | 15 J |
D. | 17 JView answer |
Answer» E. | |
13. |
15 J is the latent heat for melting of ice, what is the heat of transition from 0oC ice to 15oC water if heat of transition from 0oC water to 15oC water is 10 J? |
A. | 10 J |
B. | 15 J |
C. | 25 J |
D. | 40 JView answer |
Answer» D. 40 JView answer | |
14. |
IF_CP_OF_STEAM_IS_105_J/OC,_WHAT_IS_THE_ENTHALPY_CHANGE_OF_STEAM_FROM_106OC_TO_118OC??$ |
A. | 420 J |
B. | 640 J |
C. | 890 J |
D. | 1260 J |
Answer» E. | |
15. |
If Cp of water is 45T J/oC, what is the enthalpy change of water from 6oC to 8oC |
A. | 7 J |
B. | 14 J |
C. | 28 J |
D. | 56 J |
Answer» C. 28 J | |
16. |
If Cp of water is (23 + T) J/oC, what is the enthalpy change of water from 3oC to 5oC?$ |
A. | 54 J |
B. | 96 J |
C. | 140 J |
D. | 196 J |
Answer» B. 96 J | |
17. |
Cp of water is 10 J/oC and that of steam is 15 J/oC, what is the enthalpy change of water from 75oC to 110oC at standard conditions, if the later heat of vaporization of water is 245 J? |
A. | 395 J |
B. | 645 J |
C. | 840 J |
D. | 999 J |
Answer» C. 840 J | |
18. |
Cp of ice is 10 J/oC and that of water is 15 J/oC, what is the enthalpy change of water from – 15oC to 0oC at standard conditions, if the later heat of fusion of water is 110 J?$ |
A. | 150 J |
B. | 315 J |
C. | 485 J |
D. | 560 J |
Answer» D. 560 J | |
19. |
Cp of ice is 25 J/oC and that of water is 30 J/oC, what is the enthalpy change of water from – 10oC to 35oC at standard conditions, if the later heat of fusion of water is 110 J?$ |
A. | 250 J |
B. | 595 J |
C. | 960 J |
D. | 1410 J |
Answer» E. | |
20. |
If Cp of liquid benzene is 15 J/oC, what is the enthalpy change of water from 5oC to 10oC? |
A. | 15 J |
B. | 50 J |
C. | 75 J |
D. | 90 J |
Answer» D. 90 J | |
21. |
If Cp of liquid water is 10 J/oC, what is the enthalpy change of water at standard conditions from – 10oC to 0oC?$ |
A. | 10 J |
B. | 50 J |
C. | 100 J |
D. | Cannot be determined |
Answer» E. | |
22. |
Heat of fusion of benzene is 10 J at 0oC, if Cp of solid benzene is 10 J/oC, and that of liquid benzene is 5 J/oC what is the enthalpy change of benzene from – 10oC to 10oC?$ |
A. | 160 J |
B. | 200 J |
C. | 240 J |
D. | 300 J |
Answer» B. 200 J | |
23. |
150 J is the latent heat for vaporization of water, what is the heat of transition from 50oC water to 100oC steam if heat of transition from 50oC water to 100oC water is 12 J? |
A. | 12 J |
B. | 152 J |
C. | 162 J |
D. | 200 J |
Answer» D. 200 J | |
24. |
15 J is the latent heat for melting of ice, what is the heat of transition from 0oC ice to 15oC water if heat of transition from 0oC water to 15oC water is 10 J? |
A. | 10 J |
B. | 15 J |
C. | 25 J |
D. | 40 J |
Answer» D. 40 J | |
25. |
What is the latent heat for melting? |
A. | Heat of vaporization |
B. | Heat of fusion |
C. | Heat of Solidification |
D. | None of the mentioned |
Answer» C. Heat of Solidification | |
26. |
Which of the following is heat required in phase transitions? |
A. | Latent Heat |
B. | Sensible Heat |
C. | Depends on type of phase transition |
D. | None of the mentioned |
Answer» B. Sensible Heat | |