When we heat water, it starts to boil. This is a ___ change. A. chemical B. physical C. natural D. artificial 相关知识点: 试题来源: 解析 B。“chemical”指化学变化;“physical”指物理变化,水加热沸腾是物理变化;“natural”意为“自然的”;“artificial”意为“人工的”。所以选 B。 反馈 ...
The brought to water to a boil Boil Come to the boiling point and change from a liquid to vapor; Water boils at 100 degrees Celsius Boil Cook in boiling liquid; Boil potatoes Boil Bring to, or maintain at, the boiling point; Boil this liquid until it evaporates Boil Be agitated; The ...
If a liquid has a high vapor pressure, will it evaporate and boil easily? Why or why not? The boiling of water is a: a. physical change because the water disappears. b. physical change because the gaseous water is chemically the same as the liquid. c. chemi...
Is evaporation of water a physical change or chemical change? Which would have a larger effect on the boiling point of water, 1 mole of an alcohol or 1 mole of sugar? How does water at two different volumes have different amounts of h...
However, as the LNG absorbs heat, either from the environment or operational processes, it begins to vaporize. This vaporization, often referred to as “LNG boil-off” or “gas generation,” is the primary cause behind BOG. “Just as water boils at 100°C, turning from liquid to vapor, ...
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The chemical and physical processes — known collectively as kettle reactions — that are at work in boiling wort are important contributors to beer quality. A basic understanding of kettle reactions will take you a long way in brewing.
Calculate the heat required to raise the temperature of 0.75 kg of water from 5 degrees C to 90 degrees C? How much energy is required to heat 54.0 g of H_2O from a liquid at 65degC to a gas at 150degC? The following physical d...