Why does the boiling point of a binary mixture rise slowly throughout a simple distillation when the difference in boiling points is not large? Why does the boiling point of liquids vary with altitude? What effect does ethanol (soluble and volatile) have on the boiling point of water?
A. Decreases slowly B. Increases slowly C. Increases rapidly D. Remains constant 相关知识点: 试题来源: 解析 C。解析:文章中提到当水接近沸点时,温度上升得更快(the temperature rose more rapidly)。所以答案是 C。反馈 收藏
百度试题 结果1 题目Which of the following does not have a fixed boiling point?A.sulphurB.waterc.aird.chlorine 相关知识点: 试题来源: 解析 c 反馈 收藏
So, why have most of us been taught that the boiling point of water is constant? And, if it is not constant, how can it be used as a 'fixed point' for the calibration of thermometers? History of science has the answers.关键词:...
How Does Altitude Affect Boiling Point Of Water? Water molecules have an easy time escaping off the surface when the air pressure above them is less. Since this is a naturally-occurring condition in high altitude regions, the boiling point of water is reduced and thus it attains the boiling ...
Why does water have high entropy? Describe how to prepare 1.0 L of a 0.10 M NaCl solution. Explain how to prepare 1.0 L of isotonic saline, which is a 0.92% NaCl solution. What is the chemical make up of salt? Why does chlorobenzoic acid have a lower freezing point than benzoic aci...
Topic: Why does ammonia have a lower boiling point than water? (Read 5338 times) 0 Members and 1 Guest are viewing this topic. confusedstud Full Member Posts: 199 Mole Snacks: +3/-0 Why does ammonia have a lower boiling point than water? « on: February 14, 2013, 03:05:43 AM ...
It is a volatile liquid and has a strong, distinct odor similar to nail polish and other cleaning liquids. It has a boiling point of 56 °C (132.8 °F) and is completely miscible in water. The molecule of acetone is formed by three carbon atoms combined with six hydrogen atoms and ...
High heatis useful when you want to get the water to reach boiling temperature quickly. Once you've got where you want, reduce the heat to medium (for boiling) or medium-low (for simmering). Once the water is at a rolling boil, more heat will only make it boil away faster. ...
The cohesion of water moleculeshelps plants take up water at their roots. Cohesion also contributes to water's high boiling point, which helps animals regulate body temperature. ... On a biological level, water's role as a solvent helps cells transport and use substances like oxygen or nutrien...