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

repelling

completely separated - bond broken

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