C.3.2

Question 1

Which reaction endothermic snd exothermic

Answer 1

Neutrino,is action combustion respiration exothermic

Photosynthesis endothermic.

Btw when reaction mixture temp and surroundings go down the it becomes endothermic.

Question 2

REACTION PROFILE REMEMBER

Answer 2

1) energy change is left stick arrow to right stick, up or down
2) activation energy is from left stick to top of curve
3) more energy to break then energy released then endo

4) x axis reaction progress, y energy

Breaking bonds endo making bonds eco

Energy= start- end

If difference energy change is negative then exothermic because, less energy was used to break bonds then energy that was released when bonds made

If positive then more energy was used to break bonds, then ermegry released when bonds were broken

Question 3

What draw on reaction profile

Answer 3

Y axis is energy
X axis is reavtion progress

Then line for reactants energy, put the reactants on this line
Activation energy
Line for products and products in this line

Energy change
Down= exothermic because it took less energy from the surroundings when bonds were broken then energy was released to the surroundings when binds were made

Up = endothermic because more energy was taken in form the surroundings to break bonds then released when bonds made, meaning overall it is colder and endo