Unit 8 Thermochemistry

Ice cream melting is an example of an __________ process.

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Sweating is an __________________ process because heat is released.

• endothermic

• exothermic

Tags

NGSS.HS-PS3-4

what does c stand for?

• heat capacity

• specific heat

• mass

• temperature

Tags

NGSS.HS-PS3-4

What is the specific heat of water?

• 4.184 J/gC

• 1.00 cal/gC

• All of the above

• none of the above

What device is used to measure the amount of heat involved in a chemical reaction or physical process?

• barometer

• calorimeter

• thermometer

Tags

NGSS.HS-PS3-4

What is calorimetry?

• process of measuring kinetic and potential energy

• process of measuring heat flow of chemical reactions

• process of measuring pressure and temperature of a substance

Tags

NGSS.HS-PS3-4

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-PS3-1

NGSS.HS-PS3-4

1 food calorie = _______ chemistry calories

• 1000

• 1

• 500

• 4.184

The law of conservation of energy states that

• in any chemical or physical change, energy cannot be created or destroyed, only changed in form.

• heat changes occur during chemical and physical changes.

• energy is the capacity to do work or to supply heat

• there are two types of energy, kinetic and potential

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS1-4