Question

Please help!!

1. What are the characteristics of all chemical reactions? 2. Why does temperature affect how fast a chemical reaction occurs? (Use kinetic energy in your answer.) 3. What is stored in chemical bonds? 4. What is wrong with this chemical equation? (Hint: Think about the Law of Conservation of Mass.) Balance it. H2 + O2 ----> H2O 5. Why do certain chemical reactions require a catalyst? 6. How does energy get stored in chemical bonds? Use a different example than what was mentioned in the article to explain your answer. 7. How does pressure affect the rate of a reaction? 8. Why does adding more or less of a substance change the rate the reaction occurs? 9. What is the difference between a compound and a molecule? ***Click the molecule link in the article to find the answer. 10. What would be an example of a catalyst from a lab you did in class this year?

Answer 1

Im answering question 2
Because it increases the kinetic energy of reactants and so the frequency of collision between reactants. Thus, provided the temperature is not too high to lead to denaturation of reactants, increase in temperature increases the rate of reaction

And for ques. 7:
It gets affected when gaseous reactants in which products formed have less volume than reactants, so increase in pressure increases the rate of reaction