02:34Importance of water for life | Chemistry of life | AP Biology | Khan AcademyKhan Academy772views2rank
Multiple ChoiceWhich of the following is due to the high specific heat of water?a) Oil does not mix with water.b) A lake heats up more slowly than the surrounding environment.c) The high surface tension of water.d) Sugar dissolves in hot tea faster than in iced tea.2081views22rank
Multiple ChoiceWhich if the following defines the term evaporation?a) The conversion of a liquid into a vapor.b) The conversion of a solid into a vapor.c) The conversion of a vapor into a liquid.d) The conversion of a vapor into a solid.1842views20rank
Multiple ChoiceChoose the correct statement: Liquid water ________.a) Is less dense than ice.b) Has a lower specific heat than most other molecules.c) Has a higher heat of vaporization than most other molecules.d) Is nonpolar.2123views24rank
Multiple ChoiceImagine that organisms consisted of 70–95% alcohol instead of 70–95% water. Alcohol's specific heat is about half that of water. How would living things be different? 877views
Multiple ChoiceThe amount of heat required to change the temperature of 1 g of any substance by 1°C is defined as __________. 584views
Multiple ChoiceThe amount of heat required to convert 1 g of any substance from the liquid to the gaseous state is defined as __________. 752views
Multiple ChoiceThe reason that coastal climates are more moderate than inland climates primarily water's high __________. 675views
Multiple ChoiceWater has __________ than other liquids such as ethanol, reflecting its capacity to absorb large amounts of heat. 682views
Multiple ChoiceIf water were not a polar molecule, how would the effects of climatic warming differ from those currently observed or predicted to occur in the future? 1978views
Textbook QuestionWater has a high heat-absorbing capacity because . a. the sun's rays penetrate to the bottom of bodies of water, mainly heating the bottom surface; b. the strong covalent bonds that hold individual water molecules together require large inputs of heat to break; c. it has the ability to dissolve many heat-resistant solutes; d. initial energy inputs are first used to break hydrogen bonds between water molecules and only after these are broken, to raise the temperature; e. all of the above are true810views
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