Module 1.7 Physical & Chemical Changes

Question 1

A physical change is a change in the form of ?

Answer 1

Solid, Liquid, Gas, Solution
(but not its chemical composition)

Ex. Melting, Freezing, Boiling/Evaporation, Condensation, & Dissolving

Question 2

A chemical change is a change in the

Answer 2

Composition of Matter

Ex. Burning/Combustion, Rusting/Oxidizing, an Explosion, & Baking

Question 3

When a physical or temperature change occurs the matter

Answer 3

Remains as the same chemical substance

Question 4

When a chemical change occurs the matter

Answer 4

Changes to a different chemical substance

Question 5

Calorimetry

Answer 5

Is the study of how much heat is involved in a temperature or physical change

Question 6

Thermochemistry

Answer 6

is the study of how much heat is involved in a chemical change

Question 7

Exothermic

Answer 7

Heat is given off or extracted from the system as the changes take place

Question 8

Endothermic

Answer 8

Heat is absorbed or added to the system as the change takes place

Question 9

Melting ice to liquid water requires heat to be added, this process is called ?

Answer 9

Endothermic

Question 10

Condensing steam to liquid water requires heat to be extracted, this process is called ?

Answer 10

Exothermic

Question 11

Cooling liquid water from 25° to 20° requires heat to be extracted, this process is called

Answer 11

Exothermic

Question 12

Burning natural gas gives off heat, this process is called

Answer 12

Exothermic