Exothermic Endothermic

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

• It is an exothermic reaction

• It is an endothermic reaction

Tags

NGSS.HS-PS1-4

Which of these processes is always exothermic?

• evaporation

• burning

• insulation

• melting

Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the least endothermic?

Tags

NGSS.HS-PS1-4

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 

• Warm

• Cold

Tags

NGSS.HS-PS3-4

Baking bread and cooking an egg are examples of....?

• Endothermic processes

• Exothermic processess

• None of these 

Tags

NGSS.HS-PS1-4

When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

• exothermic    

•  activated  

• decomposition            

• endothermic

Tags

NGSS.HS-PS1-4

A + Heat -------> C + D

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

A + B-------> C + Heat

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

Feels warm or hot

• Endothermic

• Exothermic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4