Thermochemistry Study Help

The transfer of energy through molecules in direct contact is ...

• Heat

• Conduction

• Convection

• Radiation

The flow of energy that occurs when a warm liquid or gas rises ..

• Heat
• Conduction
• Convection
• Radiation

The transfer of energy by electromagnetic waves.

• Heat
• Conduction
• Convection
• Radiation

As you touch a hot stove the heat transfers -

• from your hand to the stove by conduction.

• from the stove to your hand by conduction.

• from your hand to the stove by radiation.

• from the stove to your hand by radiation.

Which sentence explains why a cold metal spoon placed in a pot of boiling water becomes hot?

• Thermal energy is transferred from the spoon to the water by conduction

• Thermal energy is transferred from the water to the spoon by conduction.

• Thermal energy in the water is transformed into kinetic energy in the spoon by convection.

• Thermal energy in the spoon is transformed into kinetic energy in the water by convection.

The movement of thermal energy from a region of _________________ temperature to a region of _____________________ temperature is called heat.

• higher, lower
• cooler, warmer
• lower, higher
• medium, medium

Which example below is an example of conduction?

• Boiling macaroni
• The attic is warmer than the basement
• The Sun heating the Earth
• Touching hot sand with your feet

Which example below is an example of convection?

• Standing on a hot metal bridge
• The attic is warmer than the basement
• The Sun heating the Earth
• Touching hot sand with your feet

Which example below is an example of radiation?

• Standing on a hot metal bridge
• The attic is warmer than the basement
• The Sun heating the Earth
• Touching hot sand with your feet

Ice cream melting is an example of an __________ process. (heat enters the system from the surroundings)

• endothermic

• exothermic