A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt

上传人(卖家):晟晟文业 文档编号:4687716 上传时间:2023-01-01 格式:PPT 页数:19 大小:241.36KB
下载 相关 举报
A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt_第1页
第1页 / 共19页
A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt_第2页
第2页 / 共19页
A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt_第3页
第3页 / 共19页
A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt_第4页
第4页 / 共19页
A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt_第5页
第5页 / 共19页
点击查看更多>>
资源描述

1、A Taste of Thermodynamics and Reaction RatesNature of Energy Energy the ability to do work or produce heat.Two basic forms of energy Potential stored energy Kinetic-energy of motionLaw of Conservation of Energy Energy can be converted from one form to another,but can not be created or destroyed.Also

2、 known as the 1 st law of Thermodynamics.Heat versus Temperature Temperature is an indication of the kinetic energy of an object.It also lets you know which way the energy will flow in relation to the surrounding objects.If an object has a higher temp than its surrounding,energy will flow out of the

3、 object to the surroundings.If an object has a temp lower than its surroundings,energy will flow into the object.Heat Heat is the measure of the amount of energy.A Calorie is the metric unit of heat.It is the amount of heat needed to raise the temperature of one gram of water one degree Celsius.The

4、SI unit is a Joule.1 calorie =4.184 Joules Specific Heat-the amount of heat needed to raise the temperature of one gram of that substance one degree celsius.A dietary Calorie,with a capital“C”is actually a Kilocalorie.So a 2000 Calorie diet is really a 2,000,000 calorie diet.So how do we measure Cal

5、ories?Calorimeter Because we know the definition of a calorie,the mass of the water in the calorimeter and the temperature change.We can calculate the number of calories produced.q=c x m x T The way the book writes it.I prefer H =c x m x T Because you cant really measure heat content,only the heat c

6、hange.I like H as change in heat.C is the specific heat of water.M is the mass of the water.T is the change in temperature.See sample problem on page 524Heat of Reaction Remember Heat of solution from last chapter?Heat of reaction is just like it,the energy change that takes place during a chemical

7、reaction.(+)heat of rx=endothermic(-)heat of rx=exothermicPotential Energy DiagramPotential Energy Diagram IINote:relate to heat and cold packsRates of reaction How fast or how slow a reaction proceeds.This can be explained using a model called the Collision Theory Collision Theory Like two cars in

8、a very large parking lot slowly and randomly moving around.What is the likely hood that they will react with each other?They have to find each other,make contact,which is hard enough,and at the correct orientation to cause an accident that will exceed the insurance deductible(threshold energy)How ca

9、n we increase the odds of an accident happening?Increase the number of cars (concentration)list various factorsincrease the speed,(temperature)bigger cars,more surface area is easier to hit.how well the vehicles are made a preus versus a BMW (nature of reactants)Demos would be goodParticle energy&TemperatureActivation energy(threshold)Catalysta farmers inventory A substance that speeds up a reaction,but is not affected by the reaction.A chemical instigator Energy of reaction

展开阅读全文
相关资源
猜你喜欢
相关搜索

当前位置:首页 > 办公、行业 > 各类PPT课件(模板)
版权提示 | 免责声明

1,本文(A-Taste-of-Thermodynamic’s-and-Reaction-Rates:一味的热力学和反应速率课件.ppt)为本站会员(晟晟文业)主动上传,163文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。
2,用户下载本文档,所消耗的文币(积分)将全额增加到上传者的账号。
3, 若此文所含内容侵犯了您的版权或隐私,请立即通知163文库(发送邮件至3464097650@qq.com或直接QQ联系客服),我们立即给予删除!


侵权处理QQ:3464097650--上传资料QQ:3464097650

【声明】本站为“文档C2C交易模式”,即用户上传的文档直接卖给(下载)用户,本站只是网络空间服务平台,本站所有原创文档下载所得归上传人所有,如您发现上传作品侵犯了您的版权,请立刻联系我们并提供证据,我们将在3个工作日内予以改正。


163文库-Www.163Wenku.Com |网站地图|