Exothermic and Endothermic reactions

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

• Endothermic

• Decomposition

• Exothermic

• Indothermic

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

• The solution at the end is acidic

• The reaction is reversible

• The reaction is exothermic

• The reaction is endothermic

if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

• Exothermic

• Endothermic

• Exotermic

• Endotermic

if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

• Endothermic

• Exotermic

• Exothermic

• Entrothermic

Examples of endothermic reactions

• Photosynthesis

• Rusting

• Respiration

• Sodium hydrogen carbonate + citric acid

• wood burning in oxygen

What type of chemical reaction absorbs energy and requires energy for the reaction to occur?

• Endothermic

• Exotermic

• Exothermic

• Endotermic

What type of reaction occurs in a hand warmer

• exothermic
• endothermic

Exothermic reactions...

• Absorb energy
• Release energy
• Release Color
• Absorb Color

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released