Physical Science B | Module 2 | Lesson 4: Quiz: "First Law of Thermodynamics"

In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 J?

1,500 J

In a heat engine, if 500 J of heat enters the system, and the piston does 300 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,500 J?

1,700 J

If the thermal energy of the system increases by 400 J, and 1,100 J of heat were added to the system, how much work did the system do?

700 J

If the thermal energy of the system increases by 600 J, and 1,400 J of heat were added to the system, how much work did the system do?

800 J

Which statement accurately describes what happens when ice melts in terms of energy?

The ice absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a solid to a liquid.

Which statement accurately describes what happens when water turns to steam in terms of energy?

The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.

Which statement accurately describes what happens when water vapor condenses into dew in terms of energy?

The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from gas to liquid.

Which statement accurately describes what happens when water turns to ice in terms of energy?

The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to solid.

In the first law of thermodynamics, ΔE=Q−W , what does ΔE stand for?

the change in the internal energy of the system

In the first law of thermodynamics, ΔE=Q−W , what does Q stand for?

the heat added to the system