Chemistry Exam 1 (Semester 2)

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

Which state of matter has a definite shape?

• solid
• liquid
• gas

The state of matter that has no definite size or shape is

• Solid

• Liquid

• Gas

Particles in a ______________________ move quickly and are far apart.

• gas

• solid

• liquid

The temperature of a substance increases as___.

• the substance expands
• the average kinetic energy of its particles increases
• the substance's volume increases
• the substance's mass increases

Definite shape and definite volume

• Solid

• Liquid

• Gas

Which of these are true situations that could be explained by the kinetic molecular theory?

• The warmer the glass of water, the faster a drop of ink will spread

• In a cold room, perfume could not spread at all

• The warmer the glass of water, the slower a drop of ink will spread

• In a cold room, perfume will travel at the same speed as a warm room

Has a definite volume but not a definite shape

• Solid

• Liquid

• Gas

Three flasks contain water at different temperatures. You allow one drop of ink to fall into each flask at the same time. After a period of time, you observe the results:

• The ink in Flask A has spread over a small area.

• The ink in Flask B is spreading more quickly than the ink in Flask A.

• The ink in Flask C has already spread evenly throughout the water. Which flask has the highest temperature?

• A

• B

• C