Are the following 4 questions true or false? 25. If the external pressure was 30
ID: 714755 • Letter: A
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Are the following 4 questions true or false? 25. If the external pressure was 300 mmiHg, at what temperature would Ethanol boil? 20. Condensation is endothermic a. 80 degrees b. 75 degrees c. 70 degrees d. 65 degrees e. 60 degrees f. 55 degrees a. True b. False 21. Sublimation is the conversion of a solid to a gas a. True b. False 26. Which of the following liquids has the lowest viscosity? 22. The process of freezing absorbs energy to occur a. Carbon disulfide b. Methanol c. Ethanol d. Heptane a. True b. False 27. Which of the following liquids has the highest vapor pressure if kept in a closed container? 23. Vaporization is exothermie a. True b. False Answer the following questions (24-28) about the graph below a. Carbon disulfide b. Methanol c. Ethanol d. Heptane 900 800 700 600 500 400 300 200 100 28. Which of the following liquids has the lowest AHvap? a. Carbon disulfide b. Methanol c. Ethanol d. Heptane Methanol 8090 10 10 10 20 30 40 Temperature rc 24. What would the normal boiling point be of Carbon Disulfide? a. 50 degrees b. 45 degrees c, 40 degrees d. 35 degrees e. 30 degrees f. 25 degreesExplanation / Answer
Process of changing solid to liquid is called melting and its endothermic
Process of changing liquid to solid is called freezing and its exothermic
Process of changing liquid to gas is called boiling and its endothermic
Process of changing gas to liquid is called condensation and its exothermic
Process of changing solid to gas is called sublimation and its endothermic
20)
Process of changing gas to liquid is called condensation and its exothermic
Answer: b
21)
Process of changing solid to gas is called sublimation and its endothermic
Answer: a
22)
Process of changing liquid to solid is called freezing and its exothermic.
so, it releases energy
Answer: b
23)
Process of changing liquid to gas is called boiling/vapourization and its endothermic
Answer: b
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