Chapter 22 Flashcards
1
Q
Name the 4 pieces of evidence of chemical reactions
A
Temperature changes, PH level changes, light is given off, fizzing starts
2
Q
What is an exothermic reaction
A
It is where heat energy is lost to the environment. Eg burning fuel
3
Q
What is an endothermic reaction
A
It involves heat energy being absorbed from the environment.eg cold packs
4
Q
What is bond breaking
A
Bond breaking is endothermic
5
Q
What is bond forming
A
Bond forming is exothermic and energy is released
6
Q
What do energy profile diagrams do
A
They show how energy is transferred during reactions
7
Q
What is an example of a biochemical reaction
A
Photosynthesis is an example of a biochemical reaction where light energy (not heat energy is transferred. Light is converted to chemical energy in the form of glucose
