5. Bond Breakers and Makers: The Energetics of Reactions

Question 1

Specific heat capacity

Answer 1

The amount of energy required to increase the temperature of 1kg of a substance by 1 degrees C

Question 2

What is the term for energy lost/ gained in a system

Answer 2

Enthalapy

Question 3

What type of reaction is it if heat absorbed during reaction? (-Delta H)

Answer 3

Endothermic

Question 4

What type of reaction is it if heat released during reaction? (+Delta H)

Answer 4

Exothermic

Question 4

How many bonds are broken and formed during chemical reaction

Answer 4

Same amount of bonds on each side

Question 5

The energy released or absorbed is the_______?

Answer 5

Bond energy

Question 6

In endothermic reactions________?

Answer 6

Energy needed to break the bond is more than energy released when new bonds are made.

Question 6

Different bonds have_______?

Answer 6

Different bond energies

Question 7

In exothermic reactions________?

Answer 7

Energy needed to break the bond is less than energy released when new bonds are made

Question 8

Activation energy

Answer 8

Minimal energy required to break bonds/ so atoms can seperate