Purchase mobileappIcon Download our Mobile App
Call Us at 011-40705070  or  
Click to Call
Select your Board & Class
  • Select Board
  • Select Class

 define hess law

Asked by Pranav Srinivas...(student), on 26/9/12

Answers

BEST ANSWER Certified by MeritNation Expert  
badges

. Hess ' Law states that the heat evolved or absorbed in a chemical process is the same whether the process takes place in one or in several steps. This is also known as the law of constant heat summation. To illustrate Hess 's law, the thermal equations and the energy level diagrams are shown below

 

 

Thermal equations Hess 's law energy level diagram
  • A + B = AB, dH 1
  • AB + B = AB2, dH 2
    then,
    A + 2 B = AB2, dH 1 2 = dH 1 + dH 2
rnrn    ======= A + 2 Bn     |   | dH 1ndH 1 2 | ===== AB + Bn     |   | dH 2n    ======= AB2n
rn  

hope it will definetly help u...

Posted by Ishan Goyal(student), on 26/9/12

This conversation is already closed by Expert

badges

 ,,,

Posted by Ishan Goyal(student), on 26/9/12
badges

Hess’s Law

Posted by Ishan Goyal(student), on 26/9/12
Ask a QuestionHave a doubt? Ask our expert and get quick answers.
Show me more questions

 
Start Practising
Enter your board and class for better results:
    Start
    close