QQ登录
微博登录 
托福培训
托福考试动态
2017-02-23 09:58
来源：新东方
作者：
Charles’s law states that if a given quantity of gas is held at a constant pressure, its volume is directly proportional to the absolute temperature. Think of it this way. As the temperature of the gas increases, the gas molecules will begin to move around more quickly and hit the walls of their container with more force—thus the volume will increase. Keep in mind that you must use only the Kelvin temperature scale when working with temperature in all gas law formulas! Here’s the expression of Charles’s law that you should memorize: Try using Charles’s law to solve the following problem. Example A sample of gas at 15oC and 1 atm has a volume of 2.50 L. What volume will this gas occupy at 30oC and 1 atm? Explanation The pressure remains the same, while the volume and temperature change—this is the hallmark of a Charles’s law question.
So, , then 2.50 L/288K = V2/303K, and V2 = 2.63 L
This makes sense—the temperature is increasing slightly, so the volume should increase slightly. Be careful of questions like this—it’s tempting to just use the Celsius temperature, but you must first convert to Kelvin temperature (by adding 273) to get the correct relationships!
推荐阅读
新东方留学院校库，留学选校有门道
A BETTER YOU,A BIGGER WORLD!
版权及免责声明
①凡本网注明"稿件来源：新东方"的所有文字、图片和音视频稿件，版权均属新东方教育科技集团（含本网和新东方网） 所有，任何媒体、网站或个人未经本网协议授权不得转载、链接、转贴或以其他任何方式复制、发表。已经本网协议授权的媒体、网站，在下载使用时必须注明"稿件来源：新东方"，违者本网将依法追究法律责任。
② 本网未注明"稿件来源：新东方"的文/图等稿件均为转载稿，本网转载仅基于传递更多信息之目的，并不意味着赞同转载稿的观点或证实其内容的真实性。如其他媒体、网站或个人从本网下载使用，必须保留本网注明的"稿件来源"，并自负版权等法律责任。如擅自篡改为"稿件来源：新东方"，本网将依法追究法律责任。
③ 如本网转载稿涉及版权等问题，请作者见稿后在两周内速来电与新东方网联系，电话：010-60908555。
托福培训
托福考试动态
