Exothermic and Endothermic

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 most exothermic?

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same

• Increase

• Decrease

Tags

NGSS.HS-PS1-4

What type of reaction occurs in a hand warmer?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

O_2(g) + 2 H_2 (g) → 2 H_2O (g) + Energy

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

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

When heat is released it is an

• exothermic reaction

• endothermic reaction

• both

• none

Tags

NGSS.HS-PS1-4

A melting ice cube is an example of

• exothermic

• endothermic

• none

• both

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

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

NGSS.HS-PS3-4