Thermochemistry Review

The diagram shows what happens when zinc reacts with hydrochloric acid. Is this reaction endothermic or exothermic? (a)  

• Exothermic
• Endothermic

Tags

NGSS.HS-PS1-4

The amount of heat energy required to change the temperature of 12 g of gold from 45°C to 15°C is -47 J. What is the specific heat capacity of gold?

• 0.13 J/(g°C)

• 17,000 J/(g°C)

• 1600 J/(g°C)

• 0.065 J/(g°C)

In an exothermic process the surrounding loses heat. 

• True

• False

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-4

In an endothermic reaction the system is releasing energy.

• True
• False

What area of study in chemistry is concerned with the heat transfers that occur during chemical reactions?

• stoichiometry

• thermochemistry

• inorganic chemistry

• physical chemistry

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-4

Cold pack is an example of

• endothermic reaction

• exothermic reaction

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-4

The reaction of calcium chloride and water in the hot pack

• releases water

• releases heat

• absorbs water

• absorbs heat

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-4

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 13 °C

• 24.°C

• 351 °C

Tags

NGSS.HS-PS3-1

What type of reaction is this?

• Exothermic

• Endothermic

• No way to tell

Tags

NGSS.HS-PS1-4

This entire setup of equipment is used to measure heat lost or gained during a chemical or physcial reaction. What is it?

• thermometer

• stirrer

• hot plate

• calorimeter

Tags

NGSS.HS-PS3-4