Exploring Endothermic and Exothermic Reactions

What does a chemical reaction involve?

• Neither breaking nor making of bonds

• Both breaking and making of bonds

• Only the breaking of bonds in the reactants

• Only the making of bonds in the products

Tags

NGSS.HS-PS1-7

In an endothermic reaction, what happens to the temperature of the surroundings?

• It fluctuates

• It remains the same

• It decreases

• It increases

Tags

NGSS.HS-PS1-4

What is required to break apart the initial bonds in the reactants during an endothermic reaction?

• Energy from the products

• A certain amount of energy

• No energy

• Excess energy

Tags

NGSS.HS-PS1-4

In an endothermic reaction, where does the extra energy come from?

• The surroundings

• The reactants

• The products

• The bonds

Tags

NGSS.HS-PS1-4

What is a key characteristic of endothermic reactions?

• Increasing temperatures

• Decreasing temperatures

• Constant temperatures

• Fluctuating temperatures

Tags

NGSS.HS-PS1-4

What is the overall energy balance in an exothermic reaction?

• Energy exiting

• Energy entering

• Energy remaining constant

• Energy fluctuating

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

What happens to the temperature in an exothermic reaction?

• It decreases

• It fluctuates

• It remains the same

• It increases

Tags

NGSS.HS-PS1-4

In an exothermic reaction, what happens when new bonds form?

• Energy is stored

• No energy change

• Energy is released

• Energy is absorbed

Tags

NGSS.HS-PS1-4

In an exothermic reaction, how does the energy released compare to the energy required to break the bonds?

• No energy is released

• Less energy is released

• More energy is released

• Equal energy is released

Tags

NGSS.HS-PS1-4

What is a key characteristic of exothermic reactions?

• Increasing temperatures

• Decreasing temperatures

• Constant temperatures

• Fluctuating temperatures

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1