Thermo Review

The temperature of a refrigerant increases as it passes through the metal coils in the interior of a refrigerator because the air inside the refrigerator —

• absorbs materials in the coils

• exerts a force on the coils

• transfers heat to the coils

• does work on the coils

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

A glass of unsweetened lemonade and ice is stirred, and the temperature is recorded as 0 °C. An additional cube of ice at -10 °C is added to the lemonade and ice. Which statement describes what will happen to the lemonade and ice mixture?

• It will turn completely to a solid.

• It will cool to -10 °C.

• It will cool to slightly less than 0 °C.

• It will remain at 0 °C.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A piece of metal and a piece of brick are both sitting in the sun. If both are the same mass, what property of matter will make the metal feel hotter to the touch?

• density

• melting point

• specific heat

• electronegativity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The specific heat of copper is 0.385 J/g °C. How much thermal energy is required to increase the temperature of a 20g sample of copper from 20°C to 50°C?

• 154 J

• 231 J

• 308 J

• 385 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Newton’s Law of Cooling explains that most macro-scale objects gain and lose thermal energy in an exponential fashion. In a lab experiment, students are provided with boiling water in a foam coffee cup to simulate the cooling of a hot beverage. Using a digital temperature probe, the students measure the temperature of the water every 30 seconds for 20 minutes. Which of the following graphs would best reveal the cooling curve for this data?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As the temperature of a fluid

decreases—

• The number of inter-particle collisions and random movement of particles decrease.

• The number of inter-particle collisions and random movement of particles increase.

• The number of inter-particle collisions increase and random movement of particles decrease.

• The number of inter-particle collisions decrease and random movement of particles increase.

Tags

NGSS.MS-PS1-4

A student is preparing to take a bath when she realizes the hot water tap in the bathroom is not working. The student goes to the kitchen and prepares 10 L

of 100° C water to mix with 90 L of 10° C water.

What will be the final temperature of the bath water?

• -1.25° C

• 19° C

• 55° C

• 110° C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A geothermal system works to supply heat from deep underground in order to heat or cool a structure. These systems take advantage of the relatively constant temperature underground.

According to the information given above, which student's prediction best describes the movement of heat in both the summer and winter?

• Andrea

• Betty

• Carlos

• Darius

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

NASA developed a reflective foil barrier to help shield spacecraft from heat transfer in space. These reflective barriers are now used in homes to prevent heat transfer by the same method.

What method of heat transfer is being prevented by the reflective barrier?

• Conduction

• Convection

• Entropy

• Radiation

In the lab, a student places a 5 kg container of water on a hot plate. The heating of the water is constant. The student records the temperature and graphs it as a function of time on the graph below.

Which point on the above graph has the lowest entropy level?

• A

• B

• D

• E

Tags

NGSS.MS-PS1-4