Thermodynamics

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• mass
• work done
• force
• pressure

Cooking fajitas on a pan is an example of what type of heat transfer?

• Conduction

• Convection

• Radiation

• Entropy

What condition is necessary for heat to flow between two objects?

• They must be of the same mass.

• They must have different temperatures.

• They must be of the same density.

• They must have different conductivities

The first law of thermodynamics, the internal energy of a system can either be increased by adding heat or doing work on the system, while energy is never lost, is a restatement of the

• Principle of entropy

• Law of heat addition

• Conservation of energy

• Law of potential energy

What type of heat transfer is used to heat your marshmallow over the hot air?

• Conduction

• Convection

• Radiation

A reflective blanket is used to insulate people who are cold. What type of heat transfer to the environment is it preventing?

• Conduction

• Convection

• Radiation

Energy can never be created nor destroyed. Which law does this refer to?

• 0th law of thermodynamics

• 1st law of thermodynamics

• 2nd law of thermodynamics

• 3rd law of thermodynamics

The heat transfer illustrated by the diagram is

• Conduction

• Convection

• Radiation

What is the definition of CONDUCTION?

• When heat is transferred from objects like rays of light or electromagnetically.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
• When heat transfers from objects that are touching.
• When heat transfers through the heater or AC in your house.

Thermal energy always moves from ___________ to __________.

• Hot to Hot
• Cold to hot
• Warmer to cooler
• Cooler to warmer