The boiling of water is a(n) ___. A. chemical reaction B. physical change C. electrical reaction D. biological change 相关知识点: 试题来源: 解析 B。解析:水沸腾是物理变化,只是状态改变,没有新物质生成。选项 A 化学反应会有新物质生成,不符合。选项 C 电反应与题目无关。选项 D 生物变化不符...
No, boiling water is NOT a chemical reaction, but it is a physical change. When water, H2 O, is in liquid form, it can be heated to a boil. Boiling...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer...
The effects of boiling water treatment on the physical properties of Quercus variabilis virgin cork ( Qv VC) were examined and compared with those of Quercus suber reproduction cork ( Qs RC). The water treatment was conducted at 100掳C for 1h. Qv VC showed a significantly higher dimensional ...
For instance, corroded or damaged plumbing might allow lead to leak into the water system, contaminating the water supply and posing a risk of physical damage. The acceptable level of TDS in drinking water supplies is determined by the WHO and BIS in India. BIS sets the standard and treatment...
More attentions have been paid to understand the flow boiling heat transfer performance and phase-change transition mechanism in micochannels. In these experiments, the single-phase and flow boiling heat transfer of pure water, pure methanol and watermethanol binary mixtures flowing through eight ...
For the application of modern control theory, specifically optimal control, to the boiling water reactor, it is necessary to have a linear model that is validated. In this paper the nonlinear model of the BWR derived on the basis of physical laws and empirical relations is linearized around an...
(physical chemistry) Boiling of a liquid whose flow results from natural convection. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or ...
b) a decrease in the boiling point of the liquid. c) a decrease in the vapour pressure of the liquid. d) no change in the boiling point of the liquid.Pure water boils at 100 degrees Celsius at 1 atm pressure. To decrease the boiling point...
The normal boiling point (also called the atmospheric boiling point or the atmospheric pressure boiling point) of a liquid is case in which the vapor pressure of the liquid is equal to the defined atmospheric pressure at sea level, The normal boiling point of water is 100 °C (212 °F) ...
Why is the melting of ice a physical change? Why does water change state in the water cycle? Why can water dissolve many substances? What is the reason for ice being less dense than water? Why does iron expand when heated to 100 degrees Fahrenheit? Why does temperature difference increase ...