Energetics
1. What is the activation energy for a reaction?
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
Chlorine reacts with methane in sunlight.
CH4 + Cl2 → CH3Cl + HCl
The diagram below shows the displayed formulae for the reaction of chlorine with methane.
The table below shows the bond energies and the overall energy change in the reaction.
C-H | Cl-Cl | C-Cl | H-Cl | Overall energy change | |
Energy in kJ/mol | 413 | 243 | X | 432 | -122 |
What is the value of X?
Higher tier only
Chlorine and ethane react together in an exothermic reaction to produce chloroethane and hydrogen chloride. The equation for the reaction is shown below.
C2H6 + Cl2 → C2H5Cl + HCl
The table below shows the relevant bond energies.
bond | bond energy / (kJ / mol) |
CーCl | + 340 |
CーC | + 350 |
CーH | + 410 |
ClーCl | + 240 |
HーCl | + 430 |
What is the overall energy change for the reaction between chlorine and ethane?
This question has 3 part(s).
The graph below shows a reaction profile for the reaction between methane and oxygen.
What does the label X represent?
