Midterm

Question 0

What is chemical energy?

Answer 0

A form of potential energy that is stored in chemical bonds between atoms.

Question 1

What is the difference between an endothermic change and an Exothermic change?

Answer 1

In an endothermic change energy is absorbed and in an Exothermic change energy is released.

Question 2

What is the difference between condensation, sublimation and vaporization?

Answer 2

Condensation is from a gas to a liquid, sublimation is from a solid to a gas, and vaporization is for a liquid to a gas.

Question 3

What are the differences between a solid liquid and a gas?

Answer 3

A solid has a definite shape and volume and a definite volume, a liquid has no definite shape but a definite volume, and a gas has no definite shape or volume.

Question 4

What are the differences between a nonmetal and a metal?

Answer 4

A non metal lacks most of the properties of a metal

Question 5

What is the difference between a polar and no polar bond?

Answer 5

In a non polar bond electrons are shared equally and in polar bonds they are shared unequally.

Question 6

Difference between a double and triple bond ?

Answer 6

A double bond is when atoms share two or more pairs of electrons and a triple bond is when atoms share three pairs of electrons.

Question 7

What is the difference between and open and closed system?

Answer 7

In a closed system no matter enters or leaves and in an open system matter can enter and leave.