Thermochemistry

This measures the average kinetic energy of molecules

• temperature

• heat

• Kevin

• Carbon dioxice

Device used to measure temperature

• thermometer

• electronic balance

• pH meter

• graduated cylinder

Observe the diagram. Which statement is true about the kinetic energy of the molecules in the containers?

• The molecules are moving faster in Diagram A

• The molecules are moving slower in Diagram A

• The molecules are moving at the same rate in both diagrams

To turn a liquid into a gas, you _____ energy.

• Add
• Remove

When you touch something that feels cold, 

• heat from your hand moves into the cold substance.
• coldness moves from the cold substance into your hand.
• it melts.
• it freezes.

Heat loss causes matter to ________. Heat gain causes matter to ________.

• contract ; expand

• expand ; contract

• stay ; change

• change ; stay

What is the transfer of heat by movement of liquids or gases?

• Radiation
• Convection
• Conduction
• Heat

What are waves that can transfer heat through the vacuum of empty space?

• Radiation

• Convection
• Conduction
• Heat

What is the transfer of heat by direct contact?

• Convection
• Electromagnetic waves
• Radiation
• Conduction

Curling Iron

• Conduction

• Convection

• Radiation