Thermochemistry

A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius.  If the reaction is our system, is the system endothermic or exothermic?

• Exothermic

• Endothermic

Tags

NGSS.MS-PS1-4

When sodium hydroxide is added to hydrochloric acid, the temperature reading on the thermometer is ______________ and the reaction name is __________________

• decreasing

• increasing

• constant

• neutralisation

• titration

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

NGSS.MS-PS3-4

when a piece of magnesium ribbon is added to some dilute hydrochloric acid in a test tube, a reaction occurs and the test tube becomes hot. the type of reaction is.....

• exothermic reaction

• endothermic reaction

Tags

NGSS.MS-PS1-4

Diagram shows reaction between sodium and water. The reaction is

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Cake baking is

• endothermic

• exothermic

Tags

NGSS.MS-PS1-4

Dissolving ammonium salt in water will cause a ___________ in temperature

• increase

• higher

• drop

• constant

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Energy level diagram for endothermic reaction

• The energy of the products is higher than the energy of the reactants.

• The energy of the products is lower than the energy of the reactants.

Tags

NGSS.HS-PS1-4

Have you ever eaten sherbet sweets? They fizz in your mouth and your tongue feels cold. Why do you think that is?

• It is an exothermic reaction

• It is an endothermic reaction

• It is made of ice

• It is dissolving your mouth

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

The reaction between nitrogen and oxygen can be represented by the following equation:

Which of the following energy level diagrams represent the above reaction?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4