Bond Energy

The graph represents the energy stored in the electrical field as the distance between hydrogen and carbon atoms changes.

Match the correct label to correct part of the graph.

a

b

c

d

bonded

completely separated - bond broken

repelling

attracting

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

The graph represents the energy stored in the electrical field as the distance between hydrogen and carbon atoms changes.

Where is the graph MOST stable?

Tags

NGSS.HS-PS1-4

Breaking bonds will always ​​ (a)   energy because the bonds need ​ (b)   added from an outside source to increase the potential energy in the ​ (c)   .

• absorb

• energy

• release

• field

• force

Tags

NGSS.HS-PS1-4

Making bonds will always ​​ (a)   energy because the bonds have less ​ (b)   which decreases the potential energy in the ​ (c)   .

• absorb

• energy

• release

• field

• force

Tags

NGSS.HS-PS1-4

Bonds between different types of atoms store different amounts of ​ (a)   . The more energy stored in the bond, the ​ (b)   stable the molecule is.

• energy

• less

• force

• more

Tags

NGSS.HS-PS1-4

When the reaction shown is conducted in an isolated container, the temperature drops. What conclusion can be drawn about the bond energy of products and reactants?

• More energy was absorbed in the formation of chemical bonds than released in the breaking of chemical bonds.

• Less energy was absorbed in the breaking of chemical bonds than released in the formation of chemical bonds.

• More energy was absorbed in the breaking of chemical bonds than released in the formation of chemical bonds.

• Less energy was absorbed in the formation of chemical bonds than released in the breaking of chemical bonds

Tags

NGSS.HS-PS1-4

In many thermodynamically favored reactions, the total bond energy of the products is lower than the total bond energy of the reactants. Therefore, thermodynamically favored reactions are often ________

• Endothermic

• Conducted in cold conditions

• Exothermic

• Conducted in warm condictions

Tags

NGSS.HS-PS1-4

Which of the following statements is true about bond energy?

• Bond energy is the energy required to break a bond.

• Bond energy is the energy released when a bond is formed.

• Bond energy is the energy stored in a bond.

• Bond energy is the energy lost during a chemical reaction.

Tags

NGSS.HS-PS1-4

What is the relationship between bond energy and bond length?

• Higher bond energy corresponds to longer bond length.

• Higher bond energy corresponds to shorter bond length.

• Bond energy and bond length are unrelated.

• Bond energy is inversely proportional to bond length.

In a chemical reaction, if the total bond energy of the reactants is greater than that of the products, the reaction is likely to be:

• Endothermic

• Exothermic

• Isothermal

• Adiabatic

Tags

NGSS.HS-PS1-4