A Complete Collection of 100000 Whys
Fav十万个为什么
为什么有些化学反应放热？
1、化学反应的本质是旧键断裂和新键形成。放热反应中，新形成的化学键比断裂的化学键更稳定，多余的能量以热能形式释放。
2、能量守恒定律解释了放热现象。反应物的总能量高于生成物的总能量，多余的能量以热量形式释放给周围环境。
3、化学键的键能差异是关键。放热反应中，生成物化学键的总键能大于反应物化学键的总键能，能量差以热能形式释放。
4、分子间的相互作用力变化。放热反应中，生成物分子间作用力更强，需要释放能量来形成这些作用力。
5、热力学原理的应用。放热反应的焓变（ΔH）为负值，表示反应过程中释放热量，系统能量降低。
总之，放热反应的本质是能量释放，由于生成物更稳定、键能更低、作用力更强，导致多余能量以热能形式释放。
1. Questo strumento raccoglie una vasta quantità di domande e risposte per rispondere ai vostri dubbi quotidiani.
2. Digitate direttamente le parole chiave della domanda che desiderate cercare nella casella di ricerca qui sopra.
3. I dati di questo strumento sono stati raccolti dal web; se riscontrate degli errori, potete segnalarceli affinché possano essere corretti.
Recommended Tools
![Audio Splicing Tool]()
Audio Splicing Tool
Splicing and merging multiple audio files online into one audio file.
![Cuboid volume calculator]()
Cuboid volume calculator
Online calculation of rectangular volume
![Online Elliptical Area Calculator]()
Online Elliptical Area Calculator
A small tool for online calculation of ellipse area
![Cone volume calculator]()
Cone volume calculator
Calculate the volume of a cone online
![Online calculator]()
Online calculator
A convenient and efficient online calculator
![Chrome内部页面查看工具]()
Chrome内部页面查看工具
Chrome内核浏览器内部页面查看工具
![Web META detection]()
Web META detection
Online detection tool for META tag information in web pages
![Stopwatch timing tool]()
Stopwatch timing tool
Online stopwatch/stopwatch timing tool
![JS (eval) encryption/decryption]()
JS (eval) encryption/decryption
Online encryption/decryption tool for eval in JavaScript
![Keyboard key testing]()
Keyboard key testing
Online keyboard key failure detection tool
![Number lottery tool]()
Number lottery tool
A tool for drawing lots through random numbers
![Screen online detection tool]()
Screen online detection tool
Test the saturation, color, and light leakage of the screen online
![Pinyin to Chinese characters conversion]()
Pinyin to Chinese characters conversion
Search Chinese characters online through Pinyin
![Airplane Battle Mini Game]()
Airplane Battle Mini Game
Online Airplane Battle Game
![Leap year and leap month query]()
Leap year and leap month query
Online query tool for solar leap year/lunar leap month
![RIPEMD160 Hash Encryption]()
RIPEMD160 Hash Encryption
RIPEMD160 Hash Encryption Online Processing Tool
![Shake encryption]()
Shake encryption
Online String Shake Encryption Tool
![Sudoku game]()
Sudoku game
Online Sudoku Mini Games
![video speed adjustment]()
video speed adjustment
The playback speed of the video can be adjusted online, ranging from 0.5x to 2x speed.
![Rich Text Editor]()
Rich Text Editor
Online professional rich text editor
![Domain name WHIOS query]()
Domain name WHIOS query
Online search for WHOIS information, domain registration date, and expiration date for domain names ..
![Convert Chinese characters to Wubi code]()
Convert Chinese characters to Wubi code
A five transaction code conversion tool for payment versions 86 and 98
![Periodic Table of Elements]()
Periodic Table of Elements
View the periodic table of elements online
![Quotes from scumbag men and scumbag women]()
Quotes from scumbag men and scumbag women
Randomly draw a quote from a scumbag man and a scumbag woman
粤ICP备2021116614号