Exothermic and Endothermic Reaction

Is this an endothermic or an exothermic reaction?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

Which letter corresponds to the activation energy of the forward reaction?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

Sydnee mixes a solution of baking soda and water. The initial temperature of the solution is 22⁰C. She adds 10mL of vinegar and takes the temperature again. The final temperature is 17⁰C. Which of the following is true?

• The reaction is exothermic
• The reaction is endothermic
• ΔH is negative
• The reaction lost heat to the environment.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What is an endothermic reaction

• A reaction where energy is realesed to its

• A reaction where energy is absorbed from its surroundings

Tags

NGSS.HS-PS1-4

What is an exothermic reaction

• A reaction where energy is released to its surroundings
• A reaction where energy is absorbed from its surroundings 

Tags

NGSS.HS-PS1-4

What is involved in a chemical reaction

• The breaking of chemical bonds in the product
• The breaking of chemical bonds in the reactant
• The forming of chemical bonds in the reactant

Tags

NGSS.HS-PS1-4

Is energy created during an exothermic reaction

• Yes 
• No
• Sometimes
• Most times 

Tags

NGSS.HS-PS1-4

Is the combustion of propane endothermic or exothermic

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

This graph is an energy diagram for a chemical reaction. Which is true of this type of reaction?

• More energy is required to break reactant bonds than is released when product bonds form

• Less energy is required to break reactant bonds than is released when product bonds form

• The bonds of the reactants do not require energy to break because the reaction releases energy

Tags

NGSS.HS-PS1-4

What is the activation energy?

• The energy of the products
• The energy of the reactants
• The minimum energy needed by the reactants to form the products.
• The energy lost in the reaction

Tags

NGSS.HS-PS1-4