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19. Below questions are based on the Table. Study this table related to meltingpoints and boiling points of different substances and answer the followingquestions. (a) Name the substances from Table A that we can find in liquid stateat room temperature (25 °C) (b) We are heating a bowl of water and a bowl ofethanol separately. We start from the same temperature and heat them on asimilar kind of flame. Which bowl will get empty first? (c) What does the meltingpoint of a solid indicate? (d) Glycerol is heated from 0 °C to 50 °C. When thetemperature reaches 17.8 °C, the temperature remains constant for a while andonly after some time, it starts to increase again. Why?Boiling point (°C)-57-42Component nameCarbon dioxidePropaneEthanolWaterGlycerolMelting point (°C)-78-188-114078.410029017.8 |
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Answer» Answer: 19. Below QUESTIONS are based on the Table. Study this table related to melting points and boiling points of different substances and answer the following questions. (a) Name the substances from Table A that we can find in liquid state at room temperature (25 °C) (b) We are heating a bowl of water and a bowl of ethanol SEPARATELY. We start from the same temperature and heat them on a similar KIND of flame. Which bowl will get empty first? (c) What does the melting point of a solid indicate? (d) GLYCEROL is heated from 0 °C to 50 °C. When the temperature reaches 17.8 °C, the temperature remains constant for a while and only after some time, it starts to increase again. Why? Boiling point (°C) -57 -42 Component name Carbon dioxide Propane Ethanol Water Glycerol Melting point (°C) -78 -188 -114 0 78.4 100 290 17.8 |
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